Solar fountains have tons of potential for do-it-yourselfers. You can make a small one or a massive one. You can make them work any number of ways. You can make one work all night long, if you want.
If your back is strong and your will ironclad, you can use indigenous rocks and mortar to build a cascading waterfall in your backyard that everybody will marvel at. You can make one very noisy with water splashing like Niagara Falls, or you can make a modest, gentle trickle. You can toss some koi into a pond and create a bio system complete with water plants and nightly raccoon raids.
The technology is simple, but you’ll need to do some wiring, and you’ll need to think about how the system components affect the whole. You need to know water pressure, flow rates, valves, electrical current, and so on (Chapter 8 can get you started). All in all, you’ll have to contemplate tons of physics, and that’s half the fun.