At that age our ds loved trucks of any sort. I'm particularly fond of the Bruder trucks (made in Germany, so meet EU safety standards).
Active Toys sells them. I really like the garbage trucks (ds went through a
major garbage truck phase) -- its popular with all the neighbor kids. (And I think if you type in GERMANTOYS before Christmas, you'll get free shipping).
If he likes toys with people/figures, I really like the Playmobil stuff.
Don't forget the possibility of something active too, like skis, a sled, a scooter, or bike.