Now I know this is the wrong time of year for this for my cold-winter readers, but gift season is here.
Freeboard: It is a skateboard with central pivot wheels in the middle which act like the smooth base of a snowboard allowing snowboard like sliding for speed control to skateboarding. It requires some lightweight bindings too.
The website has some amazing videos of dudes cruising down hills on these things — and I mean fast — but since you can slide like a snowboard (sortof hockey-stop) style you are able to control the speed better than the typical skateboard “jump off and hope to land in such a way as to hope to only break something minor”.
There are some hills in Central Park that this would be good on, but how do you get back up to the top? Walking would get old real fast. I suggest a rope-tow on the N 110th street section of the loop.