Stack sticky notes and draw the same ball near the bottom of the first page. On each following page, move it slightly upward and then back down.
Try this
Flip the pages from back to front and compare a small position change with a larger one. Ask which version feels faster and what could make the bounce easier to see.
Take it further
Keep the drawings near the same edge so they remain visible while flipping. If the sequence looks jumpy, add a page between two positions and compare the result.
