Push chair for teddies/dolls - all the kids, boys or girls love those. We got two from charity shops and hand me downs, and that means they can chase friends around.
A couple of months early, but you might as well get the balance bike now.
Other than that, balls are a good one.
Possibly just coming up to the painting age - get a good apron and a tarp and be relaxed about furniture etc.
Almost Duplo time maybe, although at that age, you'll just be making things for him, so it can be a bit of a drag.
I wouldn't worry about things being educational - they are learning by doing pretty much anything at that age - running, carrying things, climbing, riding on toys, throwing stuff, whatever it is all educational, it is hard for them to do any activity without learning. I do a lot of the looking after our one, and at that age she mostly was having picnics at the park,climbing up and jumping off stuff, playing in the woods, swimming etce whilst the jigsaw puzzles and toys were left at home, isn't a problem, she's much more into that stuff at two and three quarters now she understands them a bit better.