Here's a disc that keeps you Frisbee-ing into the night! What looks like a normal Frisbee by day is easily converted to a light up disc when the sun goes down. Simply activate the included glowsticks, secure them into the four grooves on the top of the disk, and you're good to go - up to 8 hours, which will get you close to dawn! Discs are made of sturdy, translucent polyethylene, which enables the light from the glowsticks to light up the surrounding area of the disc. Discs come in a variety of colors with refill packs of glowsticks also available in a variety of colors; mix and match to make your own favorite combination! Each disc comes with 16 glowsticks; 4 each of red, yellow, blue and green. Refill packs include 40 glowsticks.