Printed Dojo avatars with extras attached. Kids would dig having options to add clipart "gear" of the sorts of things that appeal to them (sports equipment, favorite toys, pets, etc. I'm starting class dojo with my this looks fun!
Class Dojo - Free Technology for Teachers provides insight on how to use ClassDojo, and a quick look at some of their their latest updates. ClassDojo is great for collecting and sharing behavior reports between teachers, administration, and parents,