Future Zone (S01E05)

Penny and Rudy are tasked with a report on future inventions, leading them into ChalkZone. While Rudy is sketching with the special chalk, a robot named Craniac 3 notices him and attempts to use the chalk but quickly discovers that only humans can manipulate it. In an effort to capture Rudy, Craniac 3 transports him into the futuristic dome filled with bizarre and impractical inventions that serve no real purpose.