Simple and easy to use. Battery operated with 3 light modes For boys and girls aged 4 and up. Easy press on / off button. Perfect when you don't know what to give because kids love all things that light up! popular with children and tweens, flashing glowing shoelaces are great for birthday presents, Halloween, play fun, roller or ice skating parties, party favors, teenager things, dance wear costume accessories, night time baseball , ninja cosplay, robot hands, and Easter baskets fillers.