Two girls and a robot named Bo are preparing for a science fair. They're building a model of the solar system to show how far the planets are from the Sun. While the girls take a break for lunch, Bo accidentally knocks the model over and breaks it.
Bo feels sorry, and the girls are upset because they don’t have time to build a new model. One of the girls suggests switching to the other science challenge: how astronauts do everyday things in space.
They decide to explore how astronauts brush their teeth. Bo tries to help, but the girls explain that in space, everything floats because there’s no gravity. They figure out how to brush teeth using a water bottle, toothpaste, and a straw to stop things from floating away.
In the end, Bo becomes curious about how astronauts eat without their food floating off.