The Fantastic Flute is a book based on The Backyardigans. It was sold along with a toy "flutaphone".
"Professor Tasha, the Dashing Adventurer, has just opened her Museum of Amazing Things. But there’s something missing! Join her as she embarks on an amazing adventure with the help of her fantastic, magical flute. With just a toot on her flute, she travels to ancient Egypt, helps save Pirate Pablo from a whirlpool, and saves Princess Uniqua from a fire-breathing dragon."