Heron's fountain

thingiverse

The Heron's fountain, an air pressure-based gravity-powered fountain, can be employed as a high school physics class brainteaser at the beginning of the academic year. It could inspire a series of demonstrations on water and air pressure, accompanied by storage racks. This print features a 6CM top bridge; perpendicular crossing over bridges via Skeinforge option is recommended. All watertight parts are at least 5mm thick. Assembly involves placing the side with two holes on top, then pouring liquid 1cm below the top hole to slow filling, followed by pouring into corner hole until the first hole emits water. In summary, flip so holes face up, rapidly pour into non-corner hole until overflow, then slowly add water at corners for water release from the initial hole (TLDR).