But I don't think this one will stick around for very long. Prepaid cash/debit cards and automated deposits are an older and more proven way of doing this (not to mention just handing your kids $20 in cash every week). By giving them something that is accepted everywhere, you teach them how to handle limited amounts of money and how to resist temptations -- if I drop $5 on gas station snacks, I've just burned up a sizeable chunk of my allowance on something that will be gone in 10 minutes. Giving an allowance is great to teach young teenagers how to handle money before they get their own job, but I don't see Amazon breaking into this and locking kids into buying only from Amazon.