Robustly constructed from stainless steel, these 7 reflective mirror balls are graduated in size from 50mm to 110mm, each with different contents so that every ball produces a different sound and movement effect. The hand finished shiny mirror surface provides a distorted fish-eye lens reflection which is fascinating for children to observe. Set of 7 which includes 1 x 50, 60, 70, 80, 90, 100 and 110mm dia. Suitable from birth.