Apparently it's a prepaid card that parents load up with money either manually or by a set amount per month. It then alerts you (via phone app if you want) every time the card is used, and even tells you what was bought with it. You can lock the card instantly by pressing "1" when you learn about a dodgy purchase.
Oh the pictures that ran through my head!
Smart Card Text Alert - The Queenager has just paid $100 for a thigh and shoulder tattoo.
Lock. Oh no she di'int!
Smart Card Tex Alert - The Man-Child has just bought school lunch for twenty five of his closest friends (who all just happened to have lost their lunch money that day. Again.)
Lock. I don't bloody think so!
Then you're supposed to sit your kid down for a "teachable moment." The ad says you can then have that "difficult conversation" then unlock the card when you think your teen will be ready. It will all go swimmingly.
This is how it would look like in our family (with face of Q disguised so as to prevent a messy case of matricide) -
I'm just wondering what planet those "Bill My Parent" people actually live on?