Ivy + Bean What's the Big Idea?

"It's Science Fair time at Emerson School and the kids in Ms. Aruba-Tate's class are supposed to find a way to cool down the earth. Some kids are making litterbug-eating robots. Some kids are holding their breath for a very, very long time. But what should Ivy and Bean do? Something with explosions? Something with ropes? Something with ice cubes? Or maybe something ... different."--Jacket