First in a series; an alien named Spork crash-lands on Earth, in the school playground, and gets to spend a day with the third grade. One of the students, Trixie, had been hoping for more variety in the school day; she doesn't want Spork to leave, so she takes the material ("gloop") that Spork needs to repair his spaceship and hides it in her cubby. After being reminded about how she would want to be treated (via Mrs. Buckle's classroom rules), Trixie returns the gloop - but discovers that a day on Spork's planet is much longer than a day on Earth, so Spork is sticking around for awhile! A cute, short story, a perfect series for fantasy fans. I wish the illustrations other than the cover were in color. The author includes a matching "Planet of Perils" quiz, a questionnaire reminding kids about respect and how to treat others, and a list of true/false space facts at the end.