You can show him that it's a paint program, then blow his mind one day when you can make his little characters say something and move around. Maybe have him make a ball one day and save it - when he's not around, go in there and add some gravity, momentum, friction, and elasticity. Later ask him to check out his ball sprite it should be pretty big surprise when you click the flag and the ball falls and bounces. My daughter loved just playing around with the painter.