Twist, throw, squeeze and grab them! They're great for sensory and tactile stimulation, as a tactile roll or a sensory brush Made with 100% thermoplastic rubber, they do not have BPA, phthalates or latex. Our spiky rings are strong and durable for kids and adults alike. Dishwasher safe Ideal for the classroom, home or office, they're great for parents, teachers, students, therapists and anyone else. A great alternative to other sensory toys, including sensory brushes, rolls and sticks.