Material for this project requires a 7 3/4" piece of knot free 2X4 material, two 1/2" glass marbles and and a piece of 1/8" X 1 1/4" X 7 3/4" plexiglass. First, cut the 2 X4 to 1 7/8" wide and 1 1/4" thick. Slice proximately 1/8" from from each side.
