This vibrating cushion is part of the Senseez Originals series. The outside is made of vinyl for easy cleaning. Fun soccer ball pattern that will appeal to many kids who have a love of that sport. Measures approx 25cm in diameter. Requires 2 AA batteries (not included). Vibrating cushions are not a medical device and should not be used for medical or therapeutic purposes. They are not waterproof and should never be used around or submerged in water. The vibration mechanism emits a noise that may not be suitable for some children. Each child will respond differently to Senseez. Senseez are not toys and caution should be used when they are treated as such. Senseez are intended for use with children ages 4+ with parental supervision. While they are designed to ensure safety, Senseez is not responsible if any contents are ingested or misused, or for injury resulting from electrical components.