In Keith’s book ‘IF Ever A Wiz There Was’ is a routine which requires a wooden pool triangle attached to a leash.

A cup is placed on the triangle and filled with water… it is then whirled around and around in a vertical circle! You then change direction and whirl it around your head. The water stays in the cup!A fantastic effect which will keep them talking. Great for school science shows as this is an example of centripetal force in action!

A fantastic effect which will keep them talking. Great for school science shows as this is an example of centripetal force in action!

It looks very difficult but is actually very easy to do, all you need to add is a cup of water.

If you want to do something really impressive then buy 2 and have double the fun check out the youtube link above!