The magician shows a clear balloon blown up by one spectator from the  audience, and then the magician shows a 45-cm long stainless steel  needle to be looked at by the audience. Using this needle, the magician  plunges the needle into the balloon from one end to the other and the  balloon does not burst out !! 

A full set including a special needle, 10 colourless balloons and directions. A very easy magic trick to perform.