My DS12 earns $10 a week for his chores, but I also offer "extras" occasionally where he has the opportunity to earn extra money for larger projects.
I opened up an ING account back in July for him because they were offering bonuses for opening accounts. He now has a debit card and I have an account there as well so all I have to do is electronically transfer his allowance each week. I am working with him on how to balance his account each month. I do not allow him to carry his card around with him on a regular basis, but I have it with me in case he wants to use it.
Prior to this year, he did not receive an allowance. It was expected as part of the family to take pride in his home and help out around the house. However, I think it is really important for him to understand money and I probably should have started a little earlier.
He is saving for a laptop of his own so we don't have to share. I am really glad that he has chosen to save for something really important to him and not candy bars and other junk food!!!