Suggest toys for my 10mo old

[Palooka]

Looking for toys that can be taken apart/put together by little hands. Babe is really interested in how things fit together. Puzzles are okay, but he doesn't seem to care about pictures, so that aspect of puzzles doesn't do much for him. He loves his shape-sorter, but I think he would like something that has more function... like a car where the wheels come on and off? Ideas?

P.S. please nothing with batteries.

Thanks!