What you need to prepare
Pereria on checks or translate through carbon paper thin paper the figure of a gymnast or ballerina. Engrave it.
Three good his magic wand on the cloth of wool or Rushashi dry hair. With one hand hold the stick at one end so that the other end was slightly raised. The other hand held the figurine to the middle of the ruler. Let go of the figure.
The figure will not fall, but on the contrary will twist and turn up to the free end of the line, like an acrobat under the circus dome.