To activate your LED Deco Star, remove the pull tab and flip the switch for a slow color change function.Add more batteries in your cart AG13 Batteries 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. Specifications: Size: 4.5" x 1" Weight: 0.215 lbs Modes: slow color change function. Batteries: (3) AG13, Replaceable LED Color: Red, Green & Blue