Bart Allen is Barry Allen's grandson. He was born with Super-speed, but also fast aging causing him to appear twelve when he was only two years old. Once he got his aging under control he became "Impulse". He would later become Kid Flash and finally Flash once he had grown up. The character was created by Mark Waid and Mike Wieringo and he first made a cameo appearance in "The Flash" #91 in 1994, while his first full appearance in issue #92, and appeared as the lead character in "Impulse" (1995–2002) and "" (2006–2007).