I don't suppose you're one of those kids that goes "Mom, I'll pay you back (when).." and it actually works..
*Worked for me until I was in debt about $160*
Allowance probably is the best way to go (as mentioned before),
they'll probably still be there for a while anyway.
.. That whole money-wallet thing would work if they gave you money for lunch. Don't buy lunch, and save up the money.
But, don't STEAL it.. eesh, that's a little far for a game you'll play a coupla times and move on..