Blinky Balls are motion activated, brilliantly illuminated balls that start flashing with just a slight touch. Each flash cycle lasts for 3 seconds, and then shuts off automatically. Our Blinky Balls are rated for more than 70,000 flash cycles, which is more than five times the life of comparable balls on the market. So, when the sun goes down, it's Blinky Ball time! Made of rugged, non-toxic, brilliant red plastic, and comes with replaceable batteries. Measures 2'' in diameter.