No it's not been asked 1,000 times -- more like 10,000
BUT WE ARE ALWAYS HAPPY TO STATE THIS AGAIN AND AGAIN IN THE INTEREST OF CHILD SAFETY!!!
It would make much more sence to buy as you can never be sure if hired ones have been damaged, and I doubt if hired ones will be as high a standard as those you can buy (relitively cheaply) in the UK.
intersport have them on sale might be worth getting one from there. I believe ski helmets are like riding and biking helmets, if you have a fall in them they should be replaced so i would never hire one dont know how its been treated