Our Tactile Stepping Stones are one of those versatile "must-have" therapy tools for physical and occupational therapists who work in schools, pediatric settings, and children's clinics. They make a nice sensory diet / break tool for classrooms or the office, too. Sensory stones are ideal for making obstacle courses and tactile sensory paths; they double as an under desk foot fidget, too. Nice for activites that promote balance, bilateral coordination, gross motor skills, while providing a nice dose of tactile sensory input. Each stone measures 6.25 inches in diameter and is 3.5 inches tall. Set of 6 brightly colored stones that are designed for preschoolers to adults. AWESOME!