When I'm in the kitchen cooking or washing dishes, he always goes to the same cabinet, pulls out the pots, pans and his plates and bowls and plays with them. Then - he *puts them back*.
My dad made my niece a beautiful wooden play kitchen. My sister painted it. They stocked it with fake fruits and veggies and real, tiny little pots and cast iron frying pans. I'm not a big fan of big plastic toys, although I know some of them are an inevitability.
I really want to make him a his own kitchen set though. That would be awesome.