You will need the following things to get started.
Box (I used a Postal one, but a Cereal Box or Cracker box could also work) Scrap Cardboard Utility knife or Craft Knife Tape, Masking or Gaff Pencil Paper Paint Material (for mattress cover) Scrap Soft Cell Foam (Mine is leftover from a mattress topper)
Step 1: Prepare Box
Prepare your box by removing any shiny tape. Then cover with a layer of tape to reinforce it.