This toy was actually designed by a person who suffers from ADHD. Soon his friends wanted them, then their friends wanted them, then their children wanted them. The creator of this toy approached The Sensory University with his creation and it has quickly become one of our top sellers. You will be amazed at the fact that your child will cherish this little device like a best friend that he or she can carry in their pockets. Product does contain small pieces which could be removed by force, therefore should not be placed in mouth or used by any person in which a choking hazard is present.