Mike Lookinland played the fun-loving, mischievous Bobby Brady, the youngest brother on "The Brady Bunch." The 55-year-old former child star now makes a living making concrete countertops. The adorable child actress who captured America's hearts as "Curly Sue" captivated its ears on the "The Voice." And "Jeopardy!" surprised some viewers when former "Willy Wonka" child actor Paris Themmen appeared on the game show.