"Based on the series Nick Jr. The Backyardigans as seen on Nick Jr."--T.p. verso. Reprint. Originally published: 2006. At head of title: Nick Jr. The backyardigans.
Summary:
Pablo and Tyrone, playing as supervillains Yucky Man and Dr. Shrinky, race against superheroes Uniqua and Austin--also known as Weather Woman and Captain Hammer--for control over the Key of the Wold, located in the Tower of Power.
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