When I was a kid, my folks took me to epcott just after it opened. My favorite part of the experience was the leaping frog fountains at the Imagination pavilion. The memory has stuck with me
Same here. I was excited when I saw the design on King of Random for laminar flow nozzles and remembering the frog fountains.
I don’t know what your size/cost constraints are, but my first thought is to pair a water pressure tank like this one with a low flow, higher pressure water pump like this one. Add a pressure switch, and you have a 12v water version of an air compressor. This is essentially your idea #2. If the pump lives up to its 2 gal per minute spec, and if each shot was roughly a cup of water, you get 16 shots per minute.