Make a "Plinko" prize board (or costume!)

Step 3 Drilling

Place the plexiglass on top of the back board in the proper placement. You may wish to tape down the plexi to prevent it from twisting with the drill. I used a piece of sacrificial wood underneath my backing board, and would drill straight through the two layers on top of it (plexi, back board). Hold down the plexiglass as best you can, and as close to the hole as you feel comfortable. If you are not careful, the plexi will want to jump when transitioning from the plastic to the wood underneath. If this happens, you will get a hairline crack in your plastic, and it will make you a sad panda.