Just charge Gak in the Dark under a light or the sun, then take it into the dark and watch it glow in BRIGHT COLOR! Squish your Gak into a small plastic cup and make WACKY GAK SOUNDS!
Just charge Gak in the Dark under a light or the sun, then take it into the dark and watch it glow in BRIGHT COLOR! Squish your Gak into a small plastic cup and make WACKY GAK SOUNDS!