Toys play a crucial part in development of a child. Toys as simple as wooden blocks or numbered puzzle, develops cognitive and physical skills. Complex puzzles, remote control cars, bubble guns helps learn and analyse cause effects and spatial relationships. Babies tend to play more and more with such toys and make themselves happy. Children's attitude towards their toys nurtures them big way. Features:Lights have one cool function: "chasing lights" flash Bracelets include 3 non-replaceable AG3 BatteriesSpecifications: LED Color: Blue Size: 3" to 3.75" Diameter