Players take turns pressing down POP based on any number of dice the opponent throws, and whoever push last one will lost. Premium Materials - Pop bubble fidget sensory toy is made with non-toxic rubber material. Play it Whenever You Want - This pop sensory chess board toy is lightweight and easy to carry. You can simply fold it and put it into your bag thanks to high quality rubber material, not to mention its washable and can be reused. It is encouraged for you to discover other ways to play it. Applicable target: Autistic patients, the elderly, children and adults, and other people who need to relieve stress.