Self-Inflating Bubbles
Author: Jeff Feidler: Deleware Polymer Ambassador


About the Demo:
During a class or presentation, balloons in the room begin to inflate on their own attracting much attention. Actually, dry ice inside the balloons begins to undergo sublimation filling the balloon. In time, the balloons will stretch to the limit and burst with a loud bang. Balloons should be placed in locations that will keep flying bebris away from students.

Getting Ready:
When purchasing balloons, buy large balloons if available. Fill the balloons with dry ice before the class or program begins. Balloons are easier to fill if a wide-stem funnel is placed into the balloon. When ready, tie off the ends of the balloons and place in the warmest parts of the room.

Presentation:
In this demo, any discussion of the demo should ocur after the first balloon bursts. Ignoring the ballons until the first pop adds to the interest of the demo. Remind students not to pick up any of the dry ice that may fall to the floor.

Views of the Demo:
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