Nikola Tesla was a genius who ranked along with Marconi, and other bright scientific lights of the early twentieth century. He had many amazing inventions in the electrical field and his turbine was one of them.
The Tesla turbine could pump gases or liquids very efficiently using a system of closely spaced metal disks on a spinning shaft.A very smooth flow was readily attained and the pump was very efficient.
This article shows how to construct a Tesla turbine in cardboard to demonstrate how it works. If you wish however you could use sheet metal instead of cardboard for a more robust and useful pump. The cardboard model mounted on a small electric motor delivers a steady stream of air. It can be used to ventilate a room or closet etc or dry wet items quickly. Check it out here on eBay: