Build your own levitating water fountain! Use the stroboscopic effect to "freeze time" and make water drops look like they are frozen in mid-air or even falling up. Check out the Science Buddies website for written instructions to build your own fountain and use it in a science project: https://www.sciencebuddies.org/science-fair-projects/project-ideas/Phys_p017/physics/stroboscopic-effect-levitating-water-drops.