The Magic School Bus at the Waterworks - Joanna Cole - Bog

The classic title that started the award-winning series! Join Ms. Frizzle and her students as they follow the trail of water, from its sky-high source to the school bathroom sink on this wet and wild fieldtrip. After parking the school bus on a cloud and shrinking to raindrop size, Ms. Frizzle's class gets to see the waterworks from the water's point of view.