Worlds collide when Henry makes plans to spend Saturday on the sofa watching a “Gross Class Zero” marathon — and his favorite characters come to life!

Balloon kingdoms, dopey police dragons and happy wizards are exactly how Terry remembered his Grandmother’s whacky fairy tales. Except they are real and it’s definitely not as ‘cheerful.’

Zog is a keen young dragon who wants to learn to fly, roar, and breathe fire, so he studies at the Dragon School. He is desperate to impress his teacher…