Describe what you observed of the motion of the wind-up fish in both the water and in the hand-soap. In what way were these two situations similar or different? What (if anything) was surprising to you? 3. Describe the behavior of the hand soap around the wind-up fish as indicated by the ground pepper. How is this different than how water flows around the wind-up fish? 4. Describe the motion of the wind-up-turtle; in what ways is it similar to or different from the wind-up fish? You may have noticed that while the flapping fish was able to swim in the water, it didn't make any forward progress at all in the soap! Meanwhile, the rotating turtle did make some slow forward progress. And adding to the mystery, the pepper didn't seem to flow around the fish at all despite its flapping but instead seemed to jiggle alongside the fin. How odd! In the following worksheet, you and your group will explore some of the physics behind how these toys (and how animals that use similar swimming techniques) experience fluids. c2023 Brandon Lunk and Jessica Hobbs