What you need to prepare
- Two thick books.
- Transparent disciplic line (you can use any piece of Plexiglas).
The ruler and the glass must be absolutely dry.
- Of thin paper or Styrofoam cut out figures men height of 1.5-2 see
Clamp the line between the pages of a book at a distance of 3-4 cm from the surface of the table. Under a ruler lay people. Scratch a line with a piece of paper.
Men will start to bounce and priplyasyvaet.