A Wheel is a device propelled by drivers to spin rapidly. They usually emit sparks, whistles, color and other effects. A wheel comes with it's own nail which is inserted through the center and driven into a free standing post or a tree. Make sure not to pound the nail into the post too tightly, which would prevent the wheel from spinning freely. Also make sure the nail is pounded in horizontally, which allows the wheel to spin with proper balance and the least resistance.