What you need:

1 x Plank: The size of the plank will depend on your room size. Keep in mind you will need a small space at the beginning of your plank for the elevator. The minimum plank length is 3ft (approx 1m).

1 x Thick book or something similar: Have something strong and steady to hold your weight. A block of wood or a book will keep the plank slightly elevated at the start of the plank. The player will step up on the plank and feel a slight drop when walking toward the middle of the plank.

2 x Sponges or foam: This will soften the impact between the plank and the ground. When you walk on the plank, it will move side to side slightly.