Season 1 · Episode 37
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I Have Muscles Where?
Tue, May 5, 2009
·
27 min
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!
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Tue, May 5, 2009
27 min
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Sid the Science Kid
67 episodes
Episode
S1 · E37
in Sid the Science Kid
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S1 · E38
Sid's Amazing Lungs
Wed, May 6, 2009