However...I did recently run across a silly website that allowed my sons to create their own cyberspace alter ego. Here are the results:
Easy to use and good for a giggle, the website that generated these "clay " images is free and needs no registration, no password, nor a download. It gives countless choices and countless ways to make your mother nervous. Also, once you've made a character you can use a silly Mad-libs-type script generator to type in nouns, verbs, and adjectives to come up with a nonsensical story.
I saw this site used by an elementary teacher who allowed students to each "clay" themselves and then add audio for a school video. Very clever. Very fun!