Bum slider

A bum slider is a simple sled-like toy used in snowy winter recreation, consisting of a bum-shaped flat piece of plastic or ditto, intended as the skid, and a forward looking handle for the rider to hold onto. To ride it, the rider sits on the skid and pulls the handle up between their legs in the air while sledding downhill. Depending on the part of the world, it may be viewed as a derivative of a toboggan, pulk, or other family of sleds for winter recreation.
In Swedish preschools, the bum slider is a common equipment for outdoor gross motor play during winter.
Since 2008, the Nordic Championships in extreme bum sliding, known as "X-treme Asslapp", have been held in Riksgränsen, a ski resort in Sweden.