The Bintiva balance disc is an important strengthening tool to be used by adults and children. The simple act of sitting on the disc activates core abdominal and trunk muscles. Flexor and extensor muscles work in tandem to keep your balance on the disc while continuously strengthening and toning. Through these small, continuous motions that you are making, deep core muscles are constantly stimulated and enhanced. The disc can also be used as a textured seat cushion and is great for children who have trouble sitting still. Educators and parents alike report great success using them to help calm children who have a hard time sitting still they have recognized that, for many restless children, these wiggly seat cushions have a calming effect. The disc can provide an ergonomic seating base to relieve pressure from the back and spine. Like all Bintiva products, our discs are backed by a 100% manufacturers warranty.