Dog Stress Ball (...for humans)
Can be useful as a stress reliever, focus tool or hand strengthener. In the book "Fidget to Focus: Outwit Your Boredom," psychologist Roland Rotz, Ph.D. and ADD coach Sarah D. Wright, M.S. discuss the benefits and uses of fidgets for people with Attention Deficit Disorder. May also be beneficial for any person experiencing muscle weakness in their hands.