A petal-shaped seat riding on a ball-bearing base lets a child sit, kneel, or lie across the 20.5-in disc and push off the floor for a full 360-degree spin. Working to stay centered builds grip strength, core engagement, and balance in a way that reads as pure play rather than exercise. Rounded edges run around the whole rim, foot pads under the metal base keep the chair from walking across a floor, and the frame carries 220 lb. The PP seat wipes clean and the chair assembles with no tools.