LIGHTS UP! Water-Filled Bouncy Balls which spark light when they bounce! Frozen-Inspired Colors Set of 3 fun bouncing balls you can play with in the dark! White/clear 2" Dia. rubber balls are hollow and light weight, but bounce them on the ground and watch them flash with multicolor lights. The light on the inside shines through the translucent rubber. Fun for kids of all ages. Style will vary between fractals (as shown in picture) and white glitter inside ball