Very cool pics. A few of them I'm not sure what they are, but others are things that we would all recognize, but anyone else would be clueless and just stare in wonder.
I did some similar to that when in high school. Taking pics of the water beads on a freshly waxed car. Used a trick where you hold the 50mm lens on backwards and move the camera back and forth to find the focus point. And wilthe that you have full aperature and very narrow depth.. it was fun and a few turned out good. Same kind of deal, unless you knew what it was, you would have a hard time guessing.