Lord Garmadon is up to his old tricks. He's used his Mega Weapon to turn back the clock and bring the fossil of an ancient monster back to life. That's when Cole, Jay, Kai and Zane interrupt him ... and get turned into kids again!
Now the mini-ninja must do whatever it takes to grow up and stop the monster from destroying Ninjago City. There's only one person who can help - Lloyd Garmadon: the boy destined to become the legendary Green Ninja...
Ages 4+
