To the Center of the Earth! (Backyardigans (8x8))

Tyrone can't find his lucky penny anywhere. Luckily, professors Pablo and Uniqua are here to help! They take Tyrone for a trip to the center of the Earth in their newest invention, the rocket drill. Amazing adventures abound in this fun story featuring super-cool inventions and out-of-this world illustrations. Come along to the center of the Earth!