http://www.imaginationcubed.com/
GE’s Imagination Cubed is a free Web application where students create original designs, do scientific work (for example, draw models of the solar system), write text, draw pictures for inclusion in online stories, and more. The URLs can then be e-mailed and posted, and remain hosted at Imagination Cubed. Even better, when you visit the design, you see it as it was being created (in fast-motion), so you can almost see the student’s thinking process.