Why can’t you just use your credit card?
Cash can be seen and touched and kids get that, usually at an early age,
It depends on the value of the car.
considering my kids' ages and the fact that none of them have jobs yet, i think they're good about the concept of money, spending habits too.
"I don’t mind a banshee, that’s fine. 2 banshees? I HATE you. I actually wish bad things upon you." -- Day Daily #459 P1
Well yes, that makes sense, and we do the same.
My kids are at ages where they might be someplace without me and decide they need money, so a debit card is a good idea.