Captain Hammer is a superhero played by Austin. He is Weather Woman's friend and partner. He has the ability to build anything with a small blue hammer, which he carries with him at all times.
Captain Hammer is primarily purple. He wears a metallic blue shirt with darker blue rims and a hammer emblem on the front. He also sports dark blue gloves, a dark blue mask, and dark blue pants. His unused original design included a white shirt, a blue cape, and no mask.
The web-original musical Dr. Horrible's Sing-Along Blog also features a superhero character known as Captain Hammer, complete with a very similar uniform. However, Dr. Horrible's take on the character isn't as righteous as his Backyardigans counterpart, and his powers are vastly different, as he possesses super strength and super speed but not an actual hammer.