Unicycle

The Unicycle, first seen in the episode "Button Yer Ed" seems to be owned by Rolf. Rolf was seen briefly riding the unicycle in "Avast Ye Eds." In a few episodes, like its first two appearances, it is usually seen ridden by the kids. Rolf gave his Unicycle to Kevin in "Fa, La, La, La, Ed," but Kevin was seen riding the Unicycle to perform stunts to the kids in the earlier episode "Ready, Set, Ed." In one of the Cartoon Network games, Ed Over Heels, Ed rides the Unicycle to please Nazz in the last level. It is unknown if it is the same Unicycle owned by Rolf.

Trivia

 * In the episode "Button Yer Ed", it is known as the "Unicycle of Doom".