KerPoof is a site built for kids. However, I found this site very interesting. It is interesting because with KerPoof you can make a picture, make a movie, make a drawing, make a card, or make a story. KerPoof is 100% free, and you do not have to sign up, but if you wish to save your projects you are able to sign up. I really enjoyed exploring KerPoof.
You can find KerPoof at http://www.kerpoof.com/