Visa Cards for 12-year-olds

Already we have 12-year-olds going out armed with the latest mobile phones, iPods and make up kits. Now it appears these same 12-year-olds can add their very own credit card to the mix. Is this yet another unwelcome step in the move to making children into mini adults or should we herald this a revolutionary piece of kit which will ensure our youngsters are never caught out without cash?