Licking a 9volt battery (San Francisco, CA)
My have-a-heart trap filled a lot of time catching animals (San Francisco, CA)
Building blocks, jacks. Maybe those aren't toys but are things to play with. Things that require some dexterity or help you acquire more dexterity. (Chicago, IL)
cardboard boxes and leftover containers that I could make into a thousand things (San Francisco, CA)