Bobby's Junkyard Rocket Adventure

Bobby decides to build a life-size spaceship for his school science project, using parts and pieces from a nearby junkyard. He finds glowing stones near his home, and he and his two brothers hide the stones in the spaceship, but the stones come to life, lifting the ship into the sky toward the planet they want to return to. Bobby and his brothers must overcome evil robots before they have any chance of returning home.