When I was a kid my cousins and I would go spray down an outdoor basketball court near our houses on Christmas Eve. The next day we would slide around on the ice with four-wheelers, go carts, a 1982 Lincoln Continental, anything we could sneak away with during the day. Tons of fun, only a few minor injuries over the years too.
I would have loved to get one of these out there, looks like a ton of fun.