From PBS KIDS - The Dinosaur Problem - Prehistoric Valley. When Peg and Cat get lost riding dinosaurs through a prehistoric forest, they use a diagram to find their way to safety before the Baby T-Rex catches up to them. / The Beethoven Problem - Vienna, circa 1800. When Peg and Cat are helping their pal Ludwig Van Beethoven write a symphony, Cat laughs in a certain pattern that gives Beethoven a great idea.
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