Popper Toy Jumps After a Delay

It waits, then suddenly jumps. Ask students to predict what will happen. Invert the popper and place it on a table. Key idea: The stretched rubber slowly snaps back, releasing stored elastic energy. Ask: Why doesn't it jump immediately? Safety and cleanup: Aim away from faces; use floor/table target zone. https://www.google.com/search?q=%22Popper%20Toy%20Jumps%20After%20a%20Delay%22%20science%20demonstration%20experiment