For fans of Jon Scieszka's "Frank Einstein" and Bob Pflugfelder's "Nick and Tesla" series. 10-year-old Theo's crazy grandma and genius little brother have been experimenting There's a rocket-shaped hole in the dining room, mint green slime oozing out the dog door, and a secret worm garden in the upstairs hall closet. And why exactly is Grandma looking for the baking soda? Fifth grade is complicated enough without Grandma and Toby blowing things up...