From metafilter: 'An illustration challenge... Alternate Fridays, a group of 25+ professional animators, illustrators,cartoonists, and designers riff on a given fictional character.'
So you get lots of variations on the same theme. Like Harry Potter, Alice in Wonderland or medusa. But I can't pick out all the good stuff (if you like that kind of thing) so it's worth browsing about.
ETA - this is the best of the lot I think kids' drawings turned into cartoons