This set of 3 hollow, stainless steel disks features three finishes: gold, silver and colorburst. These disks will distort reality, present reflections and produce a range of sounds for a multisensory experience that will endlessly fascinate young minds. These manipulatives are hollow with no seams or holes, which means bacteria and mold cannot build inside. Theyre also non-porous and easy to clean. These disks are strong, wont rust and feature flattened midpoints for stacking, making them ideal for centers, schools and homes! For ages 0+ | S