Lego always a good bet, or a NERF gun - loads of different types and they fire bits of foam!
Also the new Wimpy Kid book 'Hard Luck'. It came out yesterday and most boys that age (well, my son and his friends!) are really into them.
I just bought a Lego bedside clock for my son which is pretty cool.
Football, goalkeeping gloves, Arsenal back pack? Voucher for the latest football boots - don't get me started on the variety and the apparent importance of the 'right' ones!