I wouldn't push, but I always did things like counting the cars they were playing with, or the blocks they were stacking. If they boys helped me bake cookies, I would count as I put the ingredients in the bowl, and if we were paying for something, I might count the change out in front of them, that kind of thing. He's a little young to start actually doing math, instead of trying to "teach" right now, I would just be talking to him as you go about the things you're doing as you go about your daily life. This builds their vocabulary, and they do pick up the things that you're saying. As he starts to grasp numbers while you're counting, you'll know when he's ready to start adding and subtracting, and rather than doing it on paper, I'd do it with toys and things at first.
Let your child show you what he's ready for, if you take cues from him, you won't push to hard, just offer the information as he begins to understand!
at 4:36 PM on Dec. 13, 2010