I have always wanted to let my students create avatars of themselves, but had trouble finding a service that would allow them to do this without "signing up." Finally, I came across an AWESOME blog, "Mr. EduHowTo?" - he had the perfect solution in one of his posts. CLAY YOURSELF! It's free...it's easy...it doesn't require the kids to sign-up with an email...and it only took me a few minutes to create my first avatar. Check it out!