Chalkzone is an old show on nickelodeon. It features rudy taboody, a lonely, hairy goober kid with buck teeth. One day, he finds magic chalk and draws an "O" on the chalkboard. He sees a world on the other side, called chalkzone, and meets his old drawing, Snap, masturbating.
Rudy: Whoa, what is this place?
Snap: This is chalkzone, a place where all your erased chalkboard drawings show up.