Light up your next promotional activity or event with these dynamic yo-yos! This 2" round plastic toy has a translucent design that lets you see the workings inside and a red blinking light that activates while it's spinning. Each comes with two LR31 button cell replaceable batteries -- so the fun can start right away. Great times for everyone from kids to adults. Break out classic tricks like the sleeper, around the world and walking the dog! Choose a color and add your school, sports team, organizational or company logo or message to customize.