I discovered this little gem via the Beyond Bank website (linked to this deal).
Spriggy is a phone app (Android / iOS) which lets you assign 'pocket money' to your children. They get their very own VISA debit card mailed to them (with their name on it), which they can use to purchase things in shops with their pocket money that you assign them.
You place money in your 'parent wallet' (via direct debit, or debit card), and you can then dish out pocket money from the parent wallet, individually to each child.
Once your children have money in their account, they are free to spend it in shops that accept a VISA card.
Your children get their own login where they can view their card balance, so they know how much they can spend, as well as watch their balance grow.
Usually it's $30 / child / year… sign up with the coupon code, and you get to try it for the first year for free.
http://www.spriggy.com.au for more information.
The idea is for the children to SAVE the money not invent new ways for them to spend it. Parenthood you are doing it wrong