Super Sized Air Bouncy Balls with Flashing LEDs are large & in charge! Throw them, bounce them, catch them or give these Flashing Balls out as party favors - they're a sure hit with kids AND adults. These light up balls are a simple yet guaranteed good time. To activate the LEDs in your Light up Bouncy Ball, just throw it down on a hard surface. Bright lights will flash for about 15 seconds, then shut off automatically. Dimensions: Diameter 4 inches. LED Color: Blue. Ball Color: Blue. Super Sized Bounce Ball with Flashing LEDs come ready to use with non-replaceable batteries. DO NOT give to animals. Light up bouncy balls are NOT intended to be used as a chew toy.