Scratch My Back - When Benita has an awful itch in a place she can't reach, she relies on Izzy to be her back scratcher. But other animals don't have that luxury so the gang investigates how other animals scratch itches they can't reach. Legwork - After a game of hopscotch where Benita discovers she can't jump as well as the others, the Explorers look at the legs on different animals. They see how the size, number, and shape of an animal's legs affects its behavior.