How to Make an Infinitely Looping Water Fountain
<p>Arrange two watering cans so that they overflow into each other. Fill them both, then add water to one of them. The excess water will flow into the other, then back again.</p><p>I'm not a sci...
https://www.neatorama.com/2021/03/10/How-to-Make-an-Infinitely-Looping-Water-Fountain/