The above Circuit is a simple game which tests your hand’s steadi- ness. The ‘twisted wire’ shown in the Circuit is a few inches long with its insulation completely removed. The bare wire is twisted in any manner and the two ends are fixed on the board. One end connected to positive end of the battery. Take another wire and make a small loop at the end of it so that it can enter the twisted wire. The wire with the loop should be moved along the twisted wire without touching the twisted wire. If it touches, an audible sound can be heard.