his set includes 4 multi-colored, reflective, stainless steel balls for multi-sensory and gross motor activities. The stunning, iridescent, mirrored surface provides a slightly distorted reflection and fascinates children while encouraging descriptive language. The reflective surfaces change colors in the light as children move the balls. Sensory Reflective Balls are made of durable, tarnish-resistant stainless steel. They are chemical-free, seam-free, non-porous and hygienic. The balls are hollow which makes them lightweight and easy for small hands to manipulate. Use the Sensory Reflective Balls indoors or out, or to provide a focal point for displays. Suitable for all ages. Sizes: 2.4”, 3.1”, 3.5” and 5.9” dia.