Brain Candy 3 (National Geographic Kids)

Elephants have thick skin, but just how thick? Turns out it's 50 times thicker than human skin and can add as much as 2,000 pounds (900kg) to the weight of this massive animal!

Earth's smaller animals offer some sweet surprises, too. Hop on a honeybee to discover just how hardworking these fast-flying insects are. They beat their wings 200 times a second as they fly about. And no wonder they're so busy--they need to pollinate two million flowers to make just one pound (.45 kg) of honey.

Brain Candy books take a novel approach to learning by serving up an appetizing assortment of facts and numbers, then diving deeper into each topic.