Slime Snaps Fast, Flows Slow

Same material stretches slowly but snaps under rapid pull. Ask students to predict what will happen. Pull slowly, then yank quickly; let it creep over edge. Key idea: Polymer chains can rearrange over time but resist rapid deformation. Ask: Why does speed change whether it stretches or breaks? Safety and cleanup: Use known school-safe slime; handwashing after. https://www.google.com/search?q=%22Slime+Snaps+Fast%2C+Flows+Slow%22+science+demonstration+experiment