Kevin Clash has played the world's most favorite Muppet for over 25 years. Oct. 24, 2011— -- Elmo, a creature with the power to mesmerize millions of children, has a simple nature but ...

This story originally appeared on Mental Floss. For more than 50 years, “Sesame Street” has been imparting valuable moral, ethical, and social lessons to young audiences using a sprawling cast of ...