"They" say the 2nd child chooses different behaviors to differentiate from the 1st child. But I don't know. DS was entirely different from DD when he was a baby (terrible sleeper, weak internal clock, didn't want to be in a wrap, loved the baby swing, etcetc) so I dunno.

On Sunday we were working on something in the garage and I caught him counting our pieces by 2's. I have no idea where he learned that. Maybe at school? He's such a mystery.

I'm on the fence about having him tested and trying to skip him directly into 1st next year. I think he's the sort of child who will just bump along doing whatever everyone else is doing and causing trouble when he's bored.