If he's 13 he is allowed to work. He can work a max of 12 hours per week of which a max of 2 hours on schooldays & Sundays and a max of 5 hours on Saturdays. Lots of shops take on temp staff in the run up to Xmas.
He could have a good rummage through his clothes/old toys/CD's/DVD's/PC games and sell them on Ebay.
Dear Jkelly ignore Mrs Love she sounds like a parasite trying to take advantage, as they all do.
Everybody else seems to help with their ideas. A loan NEVER