Bartholomew Bart Jojo Simpson or simply Bart is a mischievous, rebellious character of the Simpsons cartoon series. Bart is the oldest child in the Simpson family. Despite his behavior Bart is also good at science, and even sports like skateboarding. Bart's skateboard is his most used vehicle throughout the series, more than his bike. He is even skating in the opening sequence of the Simpsons cartoon series. A fanart The Simpsons Skater Bart progress bar for YouTube.