A spectator is given a free choice from three small pieces of plastic, each of which has one of three different geometrical shapes cut out of its centre – namely, a square, a triangle or a circle. The spectator’s piece of plastic is placed beside a small wooden cover which has been on display from the outset.
Inside this cover there is a shallow tray. The performer now tips the tray out of the cover to reveal that it contains a single piece of plastic which also has a geometrical shape cut out of the centre of it. This cut out shape MATCHES THE SPECTATOR’S SELECTED GEOMETRICAL SHAPE.
The teak cover, which measures 6.75 x 5 x 2.25 cms and features a decorative panel set in relief on the top of it, does all the work, leaving the performer to concentrate solely on presentation.