To activate the LEDs press the button located on the battery pack inside the light up fedora. Set the sequin hat on a random light flash, blink or steady light. One size fits most. 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: LED Colors: 5 Pink Batteries: Includes 3 replaceable AG13 batteries Weight: 0.86 lbs