Rocks and Rolls
Topic: water erosion

To celebrate the founding of Walkerville, Ms. Frizzle's class sculpts a stone likeness of its founding father, Captain Walker. But as they add the finishing touches, the statue tumbles down the mountain. Ms. Frizzle turns the bus into a giant boulder and the kids into rock kids. They bump down the mountain in a desperate attempt to save the statue. By the time they reach the celebration at the base of the mountain, they've been pushed, tossed, sanded, polished, and eroded by water — as has the statue, now the size of a soccer ball. The kids are sure they've let everyone down — until they look back at the mountain for the surprise of their lives! With Jessica Walter as "Ashley Walker-Club-Dupree."