Re: Michael Faraday got my vote...
"How do I test the theory of tectonic plates for myself?"
The old "making hot coco" variation is easy, and tasty. Probably on youtube, I can't be arsed to look.
Similarly, thawing out a pot of chicken stock over a point source of heat, such as the propane torch you use to sweat copper pipes together (or situate the pot so only one corner is over the hob). As the gelatin melts and starts moving around due to convection currents, the schmaltz on top mimics continental plates. When the pot is hot, skim off the fat (retain for roasting spuds!) throw in veg, meat and seasoning to taste and enjoy your tectonic soup.
Another: make a loaf of bread. Throw the water, yeast and a little sugar (honey, molasses, anything sweet) in the bottom of a bowl and whisk together. Float the flour evenly over the top of the liquid mixture and salt to taste. As the yeast proofs, you'll see cracking & rifting and upwelling and all kinds of other geological action. Then make the bread. Serve with the soup.