Best Diffusion Experiment Ever (maybe)...Full Video in Comments!

When you pop a water balloon underwater does the water stay in one place or spread out? If we dye the water we can see how a water balloon behaves when it is popped under water and how that behavior changes when the water is hot or cold. The experiment see how density of liquids changes with temperature and how diffusion rates change with temperature.
Here are some more fun experiments!
Best Conservation of Momentum Mind Bender! (Part 1)