Earth Day activity: Make a worm compost bin. Tips for how to make one, What and what not to feed your worms, what to do with the resulting compost etc also theres a book I want to check into Worms Eat My Garbage, by Mary Appelhof;
What and what not to feed worm-farm worms. some great tips, some of the things you shouldn't feed them I thought was ok, so I learned something from this! and it's an easy way to get rich dirt for my plants!