rocketmomma,

I agree with you. It is a joy that your child is playing with the Keyboard and it is fun.

What Uncle Dave is trying to say is since your child is showing from his early age that he is interested in music, it will be good idea to start thinking about investing in his future by thinking of taking music lessons and learning the theory behind it. This will expand his horizon. I know 4 years is very young for this, but maybe in couple of years.