Herve Tullet is the genius behind a series of children's coloring and activity books, such as The Coloring Book.
His website is absolutely magical.
This is one of the best children's book author/illustrator websites I've seen. So interactive and fun.
Go to the map, and check out the following:
On the far left, the orange flower leads you to the most awesome car race for your mouse.
The scribble on the top leads you to hilarious scribbling activities.
The Coloring Book cover below leads you to strange and nearly impossible coloring activities.