The boys and I found a wonderful PDF slideshow of the basics of composting--done by kids and easy to understand. Even the carbon and nitrogen technical details are well presented and easy to understand.
Though your children may not be interested in actually doing this, the slideshow is still an excellent learning tool.
And for all those who love to garden, this is for you, too. Great gardening tips are included!
And a perk for birders......birds love compost!