Ergonomic air-filled balance and seat cushion with a slope that provides a good posture. The students can move around and at the same time maintain concentration. The knobby side of the seat cushion increases blood circulation and sensory stimulation. The other side of the cushion with small balls is perfect for sitting or standing on. Place the cushion on a chair or place it directly on the floor for balance exercises, massage, and muscle training. From 3 years.