by Frances O'Roark Dowell
Phineas is a fourth grade boy whose goal in life is to be a genius scientist. Phineas wants to create a mold museum. He grows different kinds of molds at home. Everyone thinks mold is gross, but Phineas thinks it's really cool and wants to convince everyone that they should care about mold. This is a really funny story and the back of the book tells you how to grow your own molds at home!