You can glide from a slide, but you can also glide on snow or ice. Take a look at how the peguins glide. They don't need a sled at all. Did you know that there are three kinds of sled sports? Bobsled, tobogganing and skeleton. At bobsled you sit or lie on your back in a closed sled, at tobogganing you sit or lie on your back on an open sled and at skeleton you lie on your belly.