Dr. Mac has brought Brenna, Maggie, and Zoe to Florida to visit her friend Gretchen, a marine biologist who runs a manatee rescue center that's in desperate need of money. Brenna's immediately drawn to the endangered, gentle giants, a...

On another special field trip on the magic school bus, Ms. Frizzle's class learns about the ocean and the different creatures that live there.

Just when you thought it was safe to read an early reader . . . SHARK!This fun Step 1 book about two sharks is a study in opposites. Big Shark has big teeth; Little Shark has little teeth. Big Shark swims fast; Little Shark swims slow...