To activate your LED Shark Fin Headband, remove pull tab & press button on the side. Choose from many fun light functions - flash, slow change & steady lights. 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. Note:Position headband ends in front of your ears for most comfortable fit - LED Fin will hug the back of your head. Comes ready to use with 3 replaceable AG13 Batteries.Specifications: Size: 5.5" x 9" LED Colors: Multi Color