Power Generating Shoe

Step 5 Connect the axle

Now, you connect the axle which will turn both sets of gears. Take the two biggest gears which came with the flashlights and connect them to a long skinny block. You will probably want to make your block longer than mine because then it is easier to work with. This block and later attachment will be the lever which is what will pushed down on when you step down on the shoe.
Next, connect the axle to the front assembly. You just need to slide it onto the generator assemblies. This will probably be easier if you put this on while you're putting together the front assembly.