Pinwheel (object)

Track balls are round platforms that appear in Super Mario World 2: Yoshi's Island. They float on tracks similarly to many Flatbed Ferries, but they can be moved only by being rolled from above. As such, a Yoshi must constantly balance while on them. They make brief appearances in Sluggy the Unshaven's Fort and KEEP MOVING!!!!, and in Yoshi's Island: Super Mario Advance 3, they are prominently featured in the new stage Exercise in the Skies.