LED Jelly Spike YoYo Balls-12 Pack Each set is packed with 12 brightly lit LED jelly spike yoyo balls of assorted colors. Great party favors. Light up the dance floor of your next rave with these brightly colored yoyos. Simply add pressure to the yoyo, watch and enjoy the show as its bright LEDs activate. Made of squishy plastic, each yoyos outer shell is covered in porcupine spikes that kids love.