It is a device which explains the functionalities of simple machines and energy transmission. Energy cannot be created or destroyed,but transformed to other forms. Initially some wooden blocks are arranged as above,the tap like structure at the Wheel & axis section is closed, two marbles are placed at one end of the lever, while another heavier marble ball is placed on top of the last wood.Then we hold a marble which means it is static and at some height. So some amount of potential energy is saved at that point.
When we release the marble ball at the tip of the tube by the accellaration of gravity it travels and the energy tranforms into Kinetic energy. The ball bangs on the first wooden block it encounters and falls in to the funnel and drops into a cup on the other side.The blocks fall on one another till the last block which has a heavier ball falls and drops on the Inclined plane(a sort of simple machine). That ball travels down the slope and drops on to the empty end of the Lever(another simple machine). Because of the force of fall, the other two balls at the other end of the lever jump and travel together with the heavier ball into the Wheel & Axis area(A simple machine). The functionality of the simple machines are well understood as the balls travel which is more easier for the learning student. We open the tap which directs the three marble balls to the cup which the very first marble landed. Now we've got all four marbles in one place. There is one more machine to explain as we move to the side of the device:
The last simple machine of our device is the Pulley. We show that the pulley is very handy to carry the bucket to the top. That concludes the explanation of energy transmission and functionalities of simple machines in a brief manner. But it would be appealing to see it work directly...:)
You want to know more about simple machines go to this site http://www.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm