Jump to ratings and reviews
Rate this book

How to Win a Slime War

Rate this book
Two kids face off in an epic battle to see who can sell the most slime, while navigating sticky situations with friends and family.

Alex Manalo and his dad have just moved back to Sacramento to help out with their extended family's struggling Filipino market. While Alex likes helping in the store, his true passion is making slime! He comes up with his own recipes and plays with ingredients, colors, and different bumpy or sparkly bits, which make his slime truly special. A new friend encourages Alex to sell his creations at school, which leads to a sell-off battle with a girl who previously had a slime-opoly. Winner gets bragging rights and the right to be the only slime game in town.

But Alex's dad thinks Alex should be focused more on traditional boy pastimes and less on slime. As the new soccer coach, Dad gets Alex to join the team. Even though he hates sports, Alex gives in.

Alex is battling on multiple fronts--with his new friends at school, and with his dad at home. It will be a sticky race to the finish to see who oozes out on top.

288 pages, Library Binding

First published September 14, 2021

46 people are currently reading
419 people want to read

About the author

Mae Respicio

36 books115 followers
Mae Respicio writes heart-filled middle grade novels including The House That Lou Built, which won an Asian Pacific American Libraries Association Honor Award in Children's Literature, was an NPR Best Book, and was named to many "best of" and state reading lists, Any Day With You (out now), and How to Win A Slime War (out fall 2021). Find her at www.maerespicio.com.

Ratings & Reviews

What do you think?
Rate this book

Friends & Following

Create a free account to discover what your friends think of this book!

Community Reviews

5 stars
99 (23%)
4 stars
183 (43%)
3 stars
121 (28%)
2 stars
20 (4%)
1 star
0 (0%)
Displaying 1 - 30 of 83 reviews
Profile Image for Ms. B.
3,749 reviews77 followers
August 10, 2024
8/10/24 3.5-3.75 stars, as a reread it remains heartwarming.
12/17/22 Everyone wins in this heartwarming story about Alex, a really nice tween who enjoys and making and experimenting with slime recipes. When Alex moves to a new school, the other students encourage him to participate in a a slime war with their classmate Meadow by seeing who can sell the most slime. Is Alex's heart into it? How can he stay true to himself when his classmates don't play fair?
More than a story about a slime war, Alex's Dad is starting a new venture of running his parents' (Alex's grandparents) store and has Alex playing soccer for his first time. Alex doesn't feel the same way as his Dad about soccer nor does he like all his Dad's new ideas for the store. How can Alex find his voice to tell his Dad his real feelings?
Give this one to fans of upbeat stories about discovering their own interests and voice (i.e. Turtle Boy, Hello, Universe) or those looking for more father and son stories like Brave Like That.
Profile Image for Fanna.
1,071 reviews523 followers
February 5, 2022
Filled with all the slimy fun and young feelings. Refreshing to see kid-entrepreneurs competing to sell more slime at their schools—reminds me of my own time at middle school, around fifteen years ago, when bracelet making was the trend and everyone was determined to get rich while selling cute jewellery made out of little beads. The comments on building new friendships, embracing one’s heritage, voicing out ideas, clearly conveying emotions, growth of a single dad, finding a passion, and cheering on dreams of doing business are worth appreciating.

if you wish to support: blog | ko-fi | twitter
Profile Image for Afoma (Reading Middle Grade).
751 reviews463 followers
September 17, 2021
How to Win a Slime War is a fun, heartwarming story about identity, family, Filipino culture, soccer, and entrepreneurship. Community and evolving friendships also play vital roles in this story. With a protagonist who loves making slime and is figuring out where he belongs, there are several funny and poignant moments throughout this story. I loved it and I think it’s my favorite yet from the author.

Read my full review on my blog.

Many thanks to the publisher for a free eARC of this book in exchange for an honest review.
Profile Image for Barbara.
15k reviews315 followers
December 21, 2021
Sixth grader Alex Manolo has mixed feelings about moving from San Jose to Sacramento with his dad. After all, he'll be leaving all that is familiar, including his best friend Raj. But he'll also be closer to the other members of his Filipino family and be part of revamping his grandparents' community store. Then, too, moving offers him a chance for a fresh start and a chance to shine in some way. When he learns about the popularity of slime at his new school, Golden Valley Middle, he puts his skills in concocting the pliable substance to work. With help from Logan, his new business partner, Alex starts making money hand over fist despite having fierce competition from Meadow, another classmate who has always ruled in slime-making. But the school authorities find slime distracting, and the youngsters are forced to stop selling it. Still, Alex enjoys concocting different batches and versions of slime just for fun, and he has one last chance to shine--during the Slimebreaker planned for off campus. As others have before him, Alex eventually realizes that there are many different ways to win and that winning really isn't the important thing. The way Alex changes over the course of the story, unable to stand up for himself or speak his mind to his father about the changes he's making in the family market and about his disinterest in soccer, is handled carefully and realistically and with understanding of life in middle grades. His understanding of popularity and some of its perks but also some of its pitfalls is also covered nicely through his interactions with Trevor, Logan's so-called "best friend." Readers will love having the various slime recipes that begin several of the chapters as well as appreciating that there is more to Meadow's story than what her classmates know. This is the sort of book that seems light and frothy, er, slimy, which in some ways it is, but which packs and punch and contains good lessons for readers about how to navigate sixth grade but also life.
Profile Image for M. Wolkenstein.
Author 1 book92 followers
November 5, 2021
Really fun plot and characters - themes that appeal to young and adult readers. I appreciated the dynamic growth of the father, the fact that adults can be flawed and yet grow - and introduces the problems of gentrification in a subtle way. All while oozing with slime! Great read.
Profile Image for Ian.
Author 21 books39 followers
October 1, 2021
Great read!

I've enjoyed all of Mae's books, but this one is by far the funniest. It also manages the neat trick of being funny while also telling a solid story with real characters who interact in real ways. nothing about this book feels contrived or hokey. This is a really well written story.
Profile Image for Chris.
95 reviews1 follower
July 25, 2025
Listened to the audiobook with the kids. Pretty good. Good message, decent plot. Found myself identifying strongly with the slime-hating characters.
Profile Image for Caitlin Gentine.
10 reviews
January 25, 2024
I read this with my son’s elementary school book club, and was pleasantly surprised. The kids’ struggles seem authentic to me, and the good kid stays true to himself.
Profile Image for Annalise Kraines.
992 reviews22 followers
December 3, 2023
This took me 100 years to read but I enjoyed it! A very cute story that was deeper than I expected. I love the way Alex uses his voice to defend others and participate in building community and community spaces. Also the included slime recipes were a nice touch!
Profile Image for Abby Alquicira.
296 reviews
October 16, 2025
This one was okay. I was not a fan of the entire plot being children hiding from teachers/parents & breaking rules. Besides that, I liked the ways in which this character stands up for himself. He believes in what he can make (slime) and will do anything to have his dad see that.

The audiobook made his antagonist (girl in his grade) sound nasally and was a little off-putting. Enjoyed the scientific aspects of making slime... and that's all I guess.

l-n, s-n, v-l
TW: bullying & racism
1,533 reviews24 followers
October 19, 2021
What worked:
It’s sometimes hard to find unique topics to write about, but how many books actually feature slime created by middle-grade students? The slime doesn’t become a monster, and it doesn’t terrorize the students. It’s just gooey, colorful, slime, and it’s for sale. The science teacher even makes it the subject of her first unit which gives Alex permission to practice making slime at home. Many chapters in the book begin with recipes for different kinds of slime, so young readers can make their own batches at home while they read the story!
Several subplots are skillfully interwoven with the slime war, and they mesh into an overall wonderful story. Alex’s father was a renowned athlete when he was younger, and he pushes Alex to join a soccer team. Of course, Alex has no interest in sports, so an internal conflict ensues. His father also now owns the Filipino market created by Alex’s retired grandparents, but Alex is concerned that some popular features of the business will be eliminated by his father. How will his grandparents react when they find out? Meredith currently controls the slime market at school, and the slime war will determine if Alex will replace her. However, Alex is uneasy about his business partner’s marketing strategies, and Alex slowly discovers important secrets about his competitor. It’s important to put yourself in other people’s shoes to fully understand their behaviors, and the two competitors transform their relationship to resolve the slime war.
Alex is a good, honest character who cares about doing the right thing. Meredith treats him like an enemy, but Alex tries to treat her kindly when they interact. When she creates a smear video about his slime, Alex refuses to retaliate by making negative comments against her. He even tries to work with her when they’re partnered in science class. Alex respects his father by following his rules and instructions even though Alex doesn’t agree with everything his father says. He doesn’t like playing soccer but agrees to join a team to make his father happy. He respectfully questions his father about changes to the market and displays empathy for his grandparents, Lola and Lolo. Alex enjoys spending time with his older cousins, and they provide valuable guidance. The character relationships create a truly wonderful feel-good story.
What didn’t work as well:
Some readers prefer rebellious characters and dramatic confrontations, but this book will disappoint them. The characters aren’t perfect, but their actions aren’t evil or overly devious. The typical middle-school bully doesn’t do anything terribly bad, and he displays encouragement toward Alex as the soccer season moves on. The kid’s two-faced behavior doesn’t make him likable, but it doesn’t create much negativity either. However, the book develops positive feelings between friends and family, so the author’s writing strategy is a huge success.
The Final Verdict:
A feel-good story of friends, family, and slime. A middle school being so obsessed with slime isn’t realistic, but it forms the basis for an engaging story. The positivity of the main character makes this a must-read for young readers.
542 reviews1 follower
October 18, 2021
A cute story about school, slime and soccer. Alex is a likeable character but his friends are pretty shallow. I didn't understand why they were mad at Alex after the slime fight when it was Meadow's friend who threw the slime. This "conflict" seemed blown out of proportion. This book was also too long for its intended audience. The story is too cute for upper elementary students but the book is too long to appeal to younger elementary students. I'm not a fan of slime (so messy!) but after reading this book I am tempted to try some of the recipes. Especially elephant's toothpaste...
Profile Image for Rob.
1,124 reviews4 followers
December 10, 2021
A book expected to love, but disappointed me deeply. Male Filipino MC is something I'm on the lookout for, both for my own kids and the cousins, but this was definitely a let down. The writing was weak, it was really hard to attach to any characters, the characters found things to laugh at all the time but it had no jokes for the reader. I struggled. The bright side is that for most young readers, the writing won't matter and tropes won't bother them. I would still put it on a list for a young reader looking for representation or just for some slime, but adults should steer clear.
Profile Image for Avy.
162 reviews7 followers
August 14, 2021
E-ARC provided by NetGalley~

This story follows Alex, who is an incoming 6th grade student who has always felt that he is invisible at school. He plays soccer because his dad wants him to but he actually has something that he is reallp passionate about-slime. Now, given an opportunity to sell slime at his new school, Alex thinks this is his opportunity to become popular at school. Howevr, there is one problem-or two. One, selling slime at his middle school is prohibited due to an old incident. And then two, the mean girl at school named Meadow, wants to claim the whole school to her. Now, they declre a slime war, whoever wins, will have the whole school to sell slime for themselves.

Here are the primary things that I have loved about the book:
🌟Chapters filled with ingredients to different kinds of slime
🌟Great way to teach kids to voice out their thoughts!
🌟Tell your kids to love their heritage using this book
🌟Any age could be reminded to do the things they love, not just what others what them to do

Alex is an awkward kid exploring and discovering his identity which a lot of kids can sure relate to.

Reading this book was so quick and fun, I totally enjoyed it.

I really felt represented as a Filipino kid in this book. The small traditions and the Filipino items I enjoyed growing up were mentioned too. I would definitely recommend this book for any kid and kid at heart wanting entertainment and discovery!
Profile Image for Hope Hunter.
543 reviews6 followers
July 31, 2021
Alex and his father move from Silicon Valley to Sacramento to take over his grandparent's Filipino market. Alex is happy to be closer to his family, but is still struggling with his mother's death and his father's expectations. His dad, who was raised in the area of Sacramento they returned to, was a star athlete and wants nothing more than for Alex to follow in his footsteps, Alex, however, is not interested in sports. He loves to make slime and is ready to share his slime-making skills with his new classmates. When his skills are realized, he is informed he is encroaching on the territory of Meadow, a girl who has mad slime-making skills herself. A Slime-War is declared challenging the two to outsell each other.

Engaging middle grade novel that will be a good fit for upper elementary age students. Alex is very likable character who is just a decent, kind, hard working kid who tries to do the right thing. Many students will be able to relate to him in various ways: being the new student, trying to meet parental expectations, death of a family member, dealing with a bully, dealing with racism and making new friends. Many other students will enjoy the great slime recipes scattered throughout the book!
62 reviews
July 12, 2024
How to Win a Slime War is one of the 2025 Maude Hart Lovelace/MYRA books (Minnesota Youth Reading Awards). This book is entered in the Level 1 (3rd-5th grade) category. As our school has a challenge for reading the books, I wanted to pre-read the books before the start to the new school year to see which books I would recommend for my third grade students to read for the challenge. I believe the content and language are appropriate for kids in this range and above.

I do believe my students will enjoy this story. Along with the titular Slime War, Alex goes through several challenges throughout the book- a new school, rebranding the family business, being pushed into a sport he isn't interested in, wanting to do the right thing, and being open with his dad about what he wants. I think kids can connect with different elements to the book. I appreciate that so many of the characters are well thought out and well-rounded. The extra slime recipes are sure to be a hit too!
Profile Image for Christie.
153 reviews2 followers
Read
July 18, 2021
Students will be sold at slime and soccer, but this book is so much more than just slime and soccer.

Three things to love about How to Win a Slime War:
1. The business aspects: including the characters’ strategies for selling slime like hiring influencers, and creating advertising videos, along side the ins and outs of taking over the family’s Filipino market
2. The dynamics of middle school friendships that can sometimes be competitive, can sometimes be incredibly supportive, can stem from rivalries, and can foster teamwork
3. The idea that a key to life is following our own passions and not being forced to do what others want us to do.

I love that Mae Respicio shared this story with the middle grade world.
It is pure fun and full of inspiration!
Profile Image for Erin *BookDragon_Library*.
1,012 reviews14 followers
October 1, 2024
I think kids will probably enjoy the slime recipes. A light hearted story on the surface in the vein of The Lemonade War with underlying deeper issues that could be discussed. Alex faces pressure from his dad to be in sports (dad was big athlete) when he doesn’t like sports. He’s small for his age so can face some bullying. There are reflections on racism and stereotypes, appreciation of cultural heritage, parental pressure to be in a sport and follow footsteps, not so nice friends, competitive character facing financial difficulty and staying with family. None of the more heavy issues are gone in to with a lot of depth so the book keeps the fairly light feel.

Notes: soccer. Filipino main character. Mom deceased. Single dad. New school. Maud Hart Lovelace Division 1 - 2025
Profile Image for Julie.
945 reviews28 followers
September 5, 2021
With thanks to NetGalley and the publisher for an early copy in return for an honest review.

I loved this book, although that should not surprise me as I'm a big Mae Respicio fan! Kids will like both the slime and soccer storylines, and the “kidpreneur” tips and slime recipes will be a fun bonus. I also think kids will relate to being the new kid, the bullying, racism, particularly because they're done in an engaging way that's not too heavy.

I loved this line in the book (even though it's not really about the main storyline!) - "My parents own a bookstore, so I have the world's knowledge at my fingertips! - Pepper
Profile Image for Cassie Reynolds.
230 reviews3 followers
May 30, 2022
*Thank you NetGalley and publisher for an e-ARC in exchange for an honest review*

This was such an engaging book; I finished it in one sitting. Alex moves to California with his family. He LOVES making slime, but he dad is not a fan of it. Even though slime is banned at school, Alex's friend encourages him to pursue his passions and challenge the market (which is currently dominated by one person - Meadow). A slime-making war ensues to see who can sell the most slime in a week without getting caught. There are even slime recipes throughout the book. Perfect for middle grade readers, especially those who love slime!
Profile Image for Carrie.
2,635 reviews60 followers
May 31, 2022
I found Alex to be a really authentic character -- the way he played soccer for his dad, even though his dad knew he didn't want to, the way he knew his friends' behavior was mean and while he wasn't comfortable standing up directly to them, he took action to try and fix what they had done, and the way he stayed true to his passions, even if that meant getting into trouble. I get annoyed in books when bullies suddenly turn nice for no reason, so I appreciated the way Alex and Meadow's relationship panned out, with each of them extending an olive branch (though retaining their core personalities) which ultimately leads to a truce. Plus this book is about slime, so what kid could resist?
Profile Image for Chelsea Balberan.
20 reviews
March 23, 2023
How to Win a Slime War by Mae Respicio is about a boy named Alex Manalo who moved from the Bay Area to a town where his grandparents run a Filipino store. Alex loves making slime and while his dad would prefer him to pursue other hobbies, he gets into a slime-related war at his new school.

I would consider this book to be contemporary realistic fiction that lands in the humorous school life category. The book has a lot of funny moments that I enjoyed reading. It is nice to read about a Filipino kid in a book because I never had many books that included people from my culture.

The slime recipes were also nice to know!
Profile Image for Sam Subity.
Author 4 books59 followers
June 23, 2021
My daughter is obsessed with slime, so I knew we had to check out this book. LOVED IT! In addition to including actual slime recipes at the start of many chapters, the story incorporates real STEM and business concepts as the "kidpreneur" main character Alex Manalo learns how to sell the most slime to win the slime war at his junior high. Kid readers will cheer Alex on as he pursues his passion for making slime while repeatedly trying and failing to be the soccer superstar his dad wants him to be. Don't miss this super fun read for kids ages 8-12!
Profile Image for Cassie Thomas.
602 reviews18 followers
August 18, 2021
A book written FOR kids about being a kid. I am a huge fan of Alex’s story. Alex and Meadow are facing head to head to claim territory over the middle school slime turf. As the story goes on and we follow Alex’s plan to win this slime war, so much more is taught to him and his friends. Alex learns what it means to stand up for what you believe in, what true friends look like, and how having fun and being happy are two of the most important things in life. This story is so well written. Mae did a fantastic job writing for middle grade and sharing her Filipino culture with us.
Profile Image for Em.
217 reviews3 followers
November 10, 2022
4.5 ⭐️! I took half a point off just because I would’ve liked to see a bit more to the turning point conversation between Alex and his dad- it felt a bit like a magic spell after all of the problems. MR is a GREAT writer though- I could feel all of Alex’s emotions vividly- so vividly in fact, I kept having to take breaks while reading because it was stressing me out so badly. I was SO angry with Alex’s dad!! I know my kids will love the included slime recipes, and I know a few who will relate to the pressures Alex faces.
Profile Image for Christina.
Author 6 books55 followers
November 21, 2022
I loved this book so much! The descriptions of slime-making recipes were so vivid and appealing, I felt like I was stretching and squooshing it along with the characters. The main character, Alex Manolo, is the kid you want to be friends with--in any situation, he's going to be optimistic and try his best to be kind. In fact, he's the kind of person I want to be. I also really enjoyed all the parts about playing soccer to please a parent, and finding out just because you're good at something doesn't mean you should keep doing it. Follow your heart instead!
Displaying 1 - 30 of 83 reviews

Can't find what you're looking for?

Get help and learn more about the design.