I have one, but the visible damage is fairly minimal - but it could be a good example of why you have to examine carefully and you always throw away a helmet that you've crashed and hit your head in. You could even put it out and see if the kids can tell its been crashed in before you tell them and show them the damage. If you look closely there is a crack in the back. If you want I can send you a photo of the damage to see if you want it.