I Have Muscles Where?

When Sid's Dad tells him a really funny joke, Sid laughs so hard that his face hurts. Sid wonders why his face would hurt if the joke was funny? When Sid and his friends investigate at school, they learn that they have muscles all over their bodies, even in their faces!

English français
  • Originally Aired May 7, 2009
  • Runtime 30 minutes
  • Content Rating United States of America TV-Y
  • Network PBS
  • Created June 22, 2012 by
    Administrator admin
  • Modified July 10, 2023 by
    GoRichard67