This k'nex clock runs entirely without the power of motors but uses a weight for energy. The escapement can work for about an hour before the weight needs to be lifted again but with some adjustments it would be easy to extend this period dramatically. The face of the clock displays the hour and minute using two separate hands that rotate independently. The timing is accurate to within a minute or so every few hours and the speed can be easily adjusted by changing the length of the pendulum. This project presented some challenges in terms of making the face and getting the hour hand to turn at exactly one twelfth of the speed of the minute hand. I hope you enjoy this instructable and have fun building.