Birth & up. A set of four reflective mirror surface balls provides a distorted fish-eye lens reflection in which children will want to observe. They will be fascinated to see items placed close to the mirrors including their own faces enlarged and close-up. Made from hard wearing stainless steel, these beautiful, smooth tactile balls are robustly constructed without being too heavy and therefore can be handled by young children with ease. They can be used indoors or outdoors and provides a focal point for displays. Sizes are approximately: 2.375", 3.125", 4", and 6" in diameter.