A good way to keep kids on a leash is to get them TracFone service and make them buy their own minutes. They learn to get real frugal real fast.
As for me, I'm a little TOO frugal on my plan-based phone. I'm paying for 400 peak minutes a month. This month's just about over, and if I total up my used peak minutes, night minutes, weekend minutes, and free in-network calling minutes, it's all still less than 400. I've only used 113 peak minutes.
Oh, get this: Yesterday, the Grocery Discount Center (AKA the "dented can store") up the street from my RadioShack sold some people a Nokia TracFone and told them to go to RadioShack to get it activated for free. This would, by the way, be like the Goodyear tire shop selling someone tires and telling them to take it to the local Wal-Mart to have them put on for free. In any case, my boss grumbled but activated the phone anyway... well, he tried to. Tracfone told him the phone won't work in our area. So that means the dented can store is selling people phones that won't work and pawning off their troubles on us.
I don't go to that dented can store anymore anyway. I went there once and found out that I could go to Food 4 Less and get non-dented cans--from brands I've actually heard of!--for the same price.