Taught my 1st grader multiplication!
Surprisingly fun and addictive for adults too! He's learning 5th grade math concepts and arithmetic, and I'm having fun battling him. (We play against one another on WIFI, so far he's only beaten me twice...) AI player is good, but the developers should add both easier and harder modes. Great concept and execution. Definitely get the unstoppable attacks--his favorite is "Probability"