Earthworms are amazing creatures - the ultimate recyclers. Worm World includes a worm observation tank and a small format paperback that provides general information about worms, how to collect them, and instructions for setting up the Worm World tank. Then the fun starts - like taking a worm's pulse, "hearing" a worm, investigating how eyeless worms see color, and finding out what foods worms prefer. This is a fascinating combo that will intrigue most kids and provide fun for the whole family. It would be a great addition to a classroom.