The Sensory Reflective Gold Buttons are robustly constructed from stainless steel and have a pleasingly rounded discus shape with smooth seamless edges. This makes them perfect for adding to treasure baskets as a sensory resource. Also, the polished mirror surface provides a slightly curved and distorted reflection which is fascinating for children to observe.•Great for developing mathematical language - larger, smaller, taller, steeper•Allows tactile and sensory explorationSizes: 50mm, 65mm, 80mm, 95mm, 110mm, 125mm and 140mm dia. Pack of 7. Suitable from birth.