SOLVED. Children's book about a Gifted Academy with IQ Testing and Toolbox Test and Drugged Students; possibly Sisters. [s]

[Margaret]

Please help me out, guys this is an incessant itch I can't scratch
-I know the "dumber" sister solves a puzzle where they are directed to build something using everything in the toolkit, including the screwdriver
-I think the kids at the school are being drugged through cookies?
-"dumber" sister didn't have a high enough iq to get in, but since her sister was smart, she got in

[Rainbowheart]

The Mysterious Case of the Allbright Academy?

[Margaret]

YES! Thank you so much!!!!

[Rainbowheart]

Awesome, glad to help out!