74400 "Steady hand" soldering kit

Build this soldering kit and play a great game of skill. Two eyelets in different sizes must be guided along the wire such that it is never touched by a eyelet. When contact occurs, the buzzer sounds and the red LED lights up to signal that, unfortunately, you and your shaky hand have lost. The circuit is reset using the button, the green LED starts to light up again, the buzzer stops and you start again. The fact that there are two different eyelet diameters enables two different difficulty levels. A commercially available 9 V battery (not included) is used as the power supply.