Annie Barrows' Ivy and Bean books star a pair of mismatched best friends who are nevertheless inseparable. The science fair is here, and everyone in Ivy and Bean's second-grade class couldn't be more excited. This year's theme is global warming, and all of the kids are working on their own projects and experiments. But what are Ivy and Bean up to? They could try something involving explosions, ice cubes, ropes, or possibly—and probably—something completely different!