Nordesco 30.703 Multi-Grip Disk Blue - Trying to teach children can be a challenge at times. Nordesco designed a product that will allow children to have fun and learn at the same time. This multi-grip disk allows you to have kids compete against each other by grabbing onto the multi-grip disk and practice pushing. It is also a practical tool in swimming courses because it allows the child to practice his or her swim kicks. This product is designed to be used by four people at a time.