Ivy and Bean: What's the Big Idea?Ivy and Bean: What's the Big Idea? Author: Annie Barrows Illustrator: Sophie Blackall Narrator: Hallie Ricardo Description It is the Science Fair, and the second grade is all over it! Some kids are making man eating robots. Some kids are holding their breath for a very, very long time. Some kids are doing interesting things with vacuum cleaners. The theme, obviously, is global warming. But what should Ivy and Bean do? Something involving explosions?