I do a lot of our "therapy toy" shopping at our local consignment store. We don't want to be spending a fortune on toys just in case Evan isn't able to use them. I scower the shelves and can usually find some pretty good toys.
This Kawasaki drum set has been wonderful! He is able to push all of the buttons, and slide the bars by himself. In addition to this he "whacks" the various drums to add to the beat. He learns music rhythm and beats and exercises his muscles, all at the same time. It is a great toy!