Kid Flash (Wally West)

At age 12, Wally West took a trip to his uncle, Barry Allen's house (at the time Wally had no idea about his uncle's career as The Flash) and was struck by lightning twice. The lightning had a strange effect on his blood cells and gave him super-speed.

After learning that his nephew had gained abilities simalier to his own, Barry Allen revealed his secret to Wally.

Shocked, but inspired by his idol (who was surprisingly his uncle!) Wally created his own costume, and named himself Kid Flash, a founding member of the Young Justice and most important, sidekick of The Flash.