Furry pelts and primitive inventions - it must be the ice age! Tasha and Austin live in a cave atop a mountain. They invite the Valley Cave People Tyrone, Pablo and Uniqua) over for a party. As the Valley folks travel, and the Mountain folks get the cave party-ready, all inventing things as they go, Calypso music keeps them all moving.
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Ready to Watch The Backyardigans, Season 1, Episode 15?