It’s common misperception that everything is floating on the International Space Station because there’s no gravity. This is a myth! 

Astronauts float on the ISS because they are falling around the Earth at the same rate as the ISS, and this is what causes the state of microgravity.

Using simple materials, you can observe microgravity and demonstrate it to your students.

Learn more about microgravity and find more activities in this presentation from NASA.