To use the Waboba Moonshine Light Up Bouncing Ball, simply bounce it on a hard surface. The impact will activate the strobe light, which will stay lit for about 7 seconds. This ball is great for playing in the dark, so take it outside at night or use it indoors in a dimly lit room. Since the batteries are not replaceable, once the batteries run out, you'll need to get a new ball. It's suitable for kids aged 3 and up, but make sure younger kids are supervised while playing. Keep the ball away from sharp objects to avoid damage. And remember, the styles are randomly selected at dispatch, but you can let us know your preference when you order, and we'll do our best to help.