Fraggle competitors at the starting line of the Rockbeetle Race with mossballs.

A mossball is an integral item used in the Rockbeetlle Race. It is mentioned in Episode 221: Wembley and the Great Race. As its name implies, the round object is made of moss and must be rolled using only the competitor's nose while the competitor jumps and shouts 'Rockbeetle!'. The first competitor across the finish line is the victor.