Wikijunior Books:

"The idea behind Wikijunior is to produce a series of full-color glossy booklets (48 pp.; 8 ½ x 11) for a young audience (ages 8-11) on a variety of topics that interest kids. This can include Astronomy, Animals, Dinosaurs, Countries of the World, Science, History, and virtually anything else we can think of. The books will not be comprehensive. Instead, they can form various subseries, such as African Mammals, Jurassic Carnivores, South America, the French Revolution, etc.

The idea behind Wikijunior is to produce a series of full-color glossy booklets (48 pp.; 8 ½ x 11) for a young audience (ages 8-11) on a variety of topics that interest kids. This can include Astronomy, Animals, Dinosaurs, Countries of the World, Science, History, and virtually anything else we can think of. The books will not be comprehensive. Instead, they can form various subseries, such as African Mammals, Jurassic Carnivores, South America, the French Revolution, etc. These will also be numbered (e.g., African Mammals 1-5)."

This is more than an interesting new source of information for children, it can be an interesting way to create content. In fact, you can turn the creation of a Wiki Book into a learning experience. How you do this will depend on the age of the children.