High school physics or engineering classes construct a system for piping water from a storage tank to a water dispenser. They will apply Bernoulli's principle and perform calculations for elevation, pressure, and velocity. This is a well-formulated, three-day lesson plan, complete with diagrams, handouts, and links to various resources. It is definitely worth considering for your unit in fluid dynamics or engineering design. A poignant video clip shows how a similar device can help save lives in third world countries.