Eg measure how fast bubbles rise in honey at various temperatures to calculate its viscosity. Or: drop various big blobs of water from a height and analyze what happens. Or, figure out at what windspeed candles blow out.

Relatively simple things, but not usually covered in high school physics classes.

Anyway, it was amazing how many experiments became so much more feasible than even a few years prior, because cheap digital cameras were available.

Oh, this also reminds of how ufo and Loch Ness and Yeti sightings have become so much rarer these days, because people demand proof.