I really love these! They were created by 6 and 7 year olds on their computers.
Bad Cat--evil feline genius, or just a well-intentioned but misunderstood kitty? Either way, Bad Cat (the book) is a wildly entertaining tale of mischief and misunderstanding that I highly recommend. The story of a grinning cat with a twinkle in his eye, who is constantly stirring up excitement, Bad Cat is a fun book that teaches both kids and parents a great lesson—that misbehaving occasionally doesn’t make you “bad”, and getting into scrapes isn’t the end of the world, as long as your intentions are good and your heart is in the right place.
Excerpt from Noodlenuts review
Here is a really nice blog.
A primary school teacher from Texas did this great exercise with her class, learning about geometry with the help of Bad Cat.