Balloons
Thursday, November 8th, 2007The first rubber balloons were made in 1824 by a professor to use in experiments with hydrogen. Today balloons are small, rubber bags that are filled with air. They are common for birthday parties and games. There are numerous types of balloons including hot air balloons, helium balloons, and powered balloons. They may float if they are filled with helium. There are three types of balloons: captive, free-floating, and powered.
Captive balloons are anchored to the ground or other solid fixture. They are often used in advertising. Powered balloons are also referred to as blimps. Free-floating balloons are controlled by a pilot, but directed by the wind.