So I have an 11 year old who has a Diamond Back Podium Jnr Road Bike. (see Podium 24 (Youth))

He loves it so he doesn't need another bike for his birthday. Any suggestions for a present to complement the bike?

I wouldn't mind getting new wheels so I can put the old wheels on another bike but I doubt I'll get anything much better than the R450 Alex rims in the bike.