Shouldn't mathematics keep him busy for a while?
Or astronomy/cosmology?
Both of those are pretty infinite.
Analogy is a pretty good mode of thought, generally, so he should be able to self entertain there.
Thanks Jon.
Both math and astronomy are on my list, but I'm looking ideally for specific activities therein that he can self-entertain with. He's already somewhat interested in the solar system. In between gulps while nursing yesterday, he said he was thinking about Jupiter, Saturn, and Mars, I kid you not, so you're probably on the right track.
