PLEASE don't let your children use heely's while in the parks as they are a safety issue.
When i was working on one of the parades we have a 20 second gap to allow people to cross the parade route. Well, one boy who was wearing heels started crossing the parade route when one of his wheels came off. He went flying in the middle of the parade route and one of his wheels went the other way.
Not only was it an issue that he could have got hurt when he fell over, but also the float was litterally feet away from the boy, and the wheel was a danger to the performers (and other guests!!)