Nope, squirt. I think that if he's happy, let him go to it! Child-directed is what it's all about, I think. Especially at a young age.

Mine's just bored and antsy.

And Cathy, can you tell me more about numerical analysis. What is it? Can you point me to any resources for it? It sounds like something my infinity- and pattern-loving boy would totally adore!!! Thanks for the tip!