They were disgusted with all the sites catering to kids that are more fluffy and commercial than meaningful and educational. They decided to take advantage of the hundreds of online libraries in existence to create a site to help kids explore the vast amounts of information online by themselves. Of course, the site's creators knew that the one and only way to succeed was to not be boring. And Do for smart, under-12 kids who also like to have fun.
Kids can delve into history, read a good book, find fun facts, or play a game.