Two teams touch down at the STARS space station to take on three scientific challenges to win out-of-this-world prizes. First, they must use their knowledge of forces by pumping air into balloons attached to rockets to land them on a target. Then, in a game based on light and shadows, the young scientists have to figure out what their team captains are holding by observing their shadows behind a huge screen. Finally, the teams bounce around on trampolines to feel like astronauts experiencing low gravity on the moon. They must grab as many space objects hanging above them as they can before the time is up. In the lab, Sam helps Ayo with an experiment by making observations and recording their findings in his notebook.