We took a trip to Home Depot to buy some parts.  We were able to find hinges, and a variety pack of springs.  We were unable to find a glass/plastic material, and ball bearings.

Figure One: Hinges

The hinges were $1.98.  The hinges are 3/4 inches by 11/16 inches, as seen in figure one. They're small enough to fit the ideal size of the cube.  The problem with these are that the screws are as long as the ideal thickness of the walls, so the wall thickness must be increased.  The walls will need to have screw holes drilled into them.

The variety pack of springs were $4.37.  The assortment kit was most ideal to get so that there are a multitude of springs to test and figure out which was the most ideal.

TOTAL SPENT SO FAR: $6.35