A week ago I promised I'd take a look at some online apps for Learning/Improving piano AND for parents to motivate their kids to practice!
Well here's my PICK OF THE BUNCH "Piano Marvel" (pianomarvel.com)
I've made a video review/tutorial to give you an idea of how it works. I've only scratched the surface on what you can do but if anyone's interested in a more indepth review for advanced players let me know in the comments.
This is a great program for total beginners up to advanced players who are looking for a fun and inventive way to practice PLUS learn a load of great tunes..