M.S.
I-tunes card if he has an iPod or iPad
Candy always works
Nerf guns
Legos
Nerf football
Nerf basketball hoop
Diary of a Wimpy Kid book- there is a new one out
Sunflower seeds and Big League Chew bubble gum for baseball-you can find these at a sporting goods store
Anything Minecraft-Legos, books, etc.
Hope this helps!