A.J.
Board games are fun for this age - candy land, shoots and ladders, the preschool stuff.
We got our about to turn 5 yo a CD player this year, he has been asking for one. He loves music.
Remote control cars (they make 'preschool' versions that are easier to operate!)
The Magna doodle is a big favorite with my youngest two
I can't help other than that, my sons other present is a Transformers thing LOL