Spinney-Do was an underwater game played on the territory of Cloral. Players would sneak up behind spinneys, leap on top of them, hold on to the ridges on their back, and stay on as long as they could before the spinney bucked them off.

The first time Spinney-Do was introduced to the reader was in The Lost City of Faar, when Spader showed Pendragon it.

When Veego and LaBerge traveled to Cloral, they took the idea for Spinney-Do, brought some spinneys back to the territory of Quillan, and incorporated the activity into the Quillan Games.