From Grand Illusions.

Sign up for the free Grand Illusions newsletter, at http://conta.cc/3dplns1
_______________________________________________________________________

Tim has many balloon based toys in his collection.

All these demonstrations involve something INSIDE the balloon.

The first balloon sits quietly on the table, until it suddenly shoots up into the air! A small gadget inside, with a rubber sucker and a spring, needs to be pushed together and then – when the sucker loses its grip – the gadget springs apart and causes the balloon to suddenly leap up in the air!

The next balloon has a UK 10p piece coin inside. This coin has a milled edge, so if you spin the balloon so that the coin is then spinning around on the inside, you hear a strange ‘whizzing’ noise.

Tim then shows what happens if instead of one 10p coin, you use two 5p coins.

Then Tim shows a balloon with two ‘blaster balls’ inside. These have small percussion caps all over the surface which go bang when they hit a hard object. So as you shake the balloon, you keep hearing little bangs coming from inside!

A balloon as maracas…

Finally, Tim demonstrates the Bernoulli Theorem using two balloons attached to a piece of string. When you blow between the two balloons while they are suspended on strings, instead of the balloons being blown apart, as you might expect, they are blown together. Most unexpected!