Chris Ang suggested using colored water - so I added some green food coloring. The results are much more dramatic. I'm shooting at 1/100, flash at 1/128 intensity (short flash pulse), ISO 100, f/25 (to maximize depth of field)
A drop entering the water and the splash response projecting upward around the drop
A fully developed splash "crown"
Two drops falling into a crater formed by the 1st drop falling into the water
Interesting distortion of the drop falling into the crater
My focus plumb bob - a needle superglued to a small pin
A closeup of the thread and pin. I tape the thread to the side of the outlet of the drop maker and focus on the point where the pin touches the water.