Step 3: Assemble the Box
Using wood glue and a nail gun (or hammer and nails if you wish), assemble the box making sure the grooves are going the right direction.
Step 4: Cut the Window Pieces
Cut a piece of ¼” plywood at 12 ½”x13” and another at 8”x12 ½”. Make sure they slide in the grooves in your box.
Then, using a jig saw, cut out the windows. I used a hole saw to help make the rounded edges on the corners and allow me to get my jig saw blade started. You don’t have to do this. You could just drill a hole big enough for your blade to fit and cut the rounded corners using your jig saw. Either way works fine.