Why would it be weird for a boy to want a play kitchen? The top chefs in the world are men. My Dh cooks and actually he cooks better than me. I would actually want my DS to play kitchen rather than to play with guns and pretend to shoot people, but that is another topic for another day.
Forget the gender appropriate stuff, that was done and over with along time ago. Girls can be police officers, carpenters and astronauts and boys can be teachers, models and a stay at home dad. This is 2007, anything goes.