DS has correctly pointed out that DS has tons of little toys - cars, figures, animals etc and so for Christmas wants to get him something that he can play with and that does something, whatever that means. He has no actual ideas!!
So, do you??
He already has a small kitchen, rarely plays with it. Dolls house and rocket ship get played with a bit, certainly doesn't need extra stuff. He has a scooter but has awful balance so plays a little on it. Outside slide. Doesn't like swings.