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

Step 4 Add the pegs

Do a test fitting of the pegs with the plexiglass. The plexiglass is held off of the backboard with nylon spacers. The pegs themselves are just machine screws with locknuts on top of the plexi. During the test fit, you shouldn't need to tighten down the nuts very much at all. The plinko board works best if the spacers can "spin" slightly on the machine screws, rather than being locked down tight. This prevents pucks from possible perilous placement (the puck getting stuck while coming down the board). In preparation for testing, I've added side rails. The side rails are just pieces of square dowell (hobby shop). I held them in place with masking tape for this incarnation, but in the final assembly, they are hot glued to the backer board.