Compost: A Family Guide to Making Soil from Scraps by Ben Raskin
I talked with a neighbor who does vermicomposting (composting via worm power) in his garage. Our electronic composter recently died, so I've been wondering how to compost again and talking about his vermicomposting inspired me to do some more research.
This is a wonderful, kid-friendly introduction to composting basics. It talks about soil, compost, worms, and how to create and maintain a compost pile. It also includes stickers and a game about what can be composted and what you should avoid putting into your pile.