Adequate to Meet Your Needs: you will receive 4 pieces of wobble cushions in different colors, 1 pieces of needle pump; The quantity and colors are sufficient for you to apply and replace, and can easily meet your daily use and other requirements Improve Children's Attention: these balance pads for exercise are practical helpers for kids to keep concentrating, kids can sit on them to reading, writing, eating, playing and others, staying focused Correct Sitting Posture: our wiggle seat for sensory kids is soft and comfortable, can effectively correct kids' sitting posture and relieve physical fatigue, helping to develop good reading and writing habits Proper Dimension to Apply: the size of the flexible seating classroom is about 13.5 inches/ 34.5 cm in diameter, appropriate and convenient for you to use, suitable for most kids, bringing you a nice and satisfying experience Serviceable and Lasting: each balance disc is made of quality PVC, reliable and sustaine