Australia's Hot Air Balloon

Australia Post has recently issued a series of 4 postage stamps depicting hot-air ballooning. Released on May 6, 2008, the stamps celebrate the 150th anniversary of the first successful balloon flight in Australia. One-hundred fifty years ago, no one could have imagined that stamps would someday fly across the world attached to letters and carried on jet airplanes.

Source: http://www.stampsofdistinction.com/2008_05_01_archive.html

We belive that the image of the hot air balloon in this series of post stamps is very representavive of our concepts because we see the balloon as this huge object that at the same time is very delicate because what makes fly is only air and a thin fabric that can be easily damaged.