Viacom Nickelodeon Gak Glow in the Dark Glows Green

Description

Gak in the Dark will totally Glow your Mind! Just Charge Gak under a light or the sun, then take it into the dark and watch it glow Bright Colors! The Gak color you see in the light is the color that glows at night! Swoosh it! Twist it! Bubble it! Mix it! You've got the Knack for Gak!