Rudsworth Bartholomew “Rudy” Clark Tabootie is the main character. He is in the fifth grade. He travels to Chalkzone with his best friends Penny and Snap. He has a magic piece of chalk that he can use to draw portals into ChalkZone and draw things out of thin air. It has been suggested throughout the series that he has a crush on Penny.
When Rudy was eight, he discovered a magic piece of chalk that allowed him to enter an amazing world called "ChalkZone," a place where everything that has ever been drawn in chalk, and then erased, reappears and remains forever. Since his discovery, Rudy lives a dual existence, one in the real world, and one in ChalkZone. In his adventures, he has saved ChalkZone and its inhabitants from countless dangers, and saved his town a few times, when some of the more unusual elements find their way into the real world.