Bernoulli's Principle states that when an incompressible fluid moves through different sizes of tube, the fluid's speed changes. This simple do it yourself science experiment presented by Mr. G shows this plain and simple.
This GREAT video will have you huffing and puffing your way to a lesson in spinning. Mr. G experiments on a small, medium, and LARGE scale. This one is EASY, VERSITILE, and might even help you win a few bets.
You'll need a balloon, a funnel, a hair dryer, drinking straw, ping pong ball, and a ball bearing.