You'll need Dollar Tree's Crafter's Square Rectangular Wooden Crate with Handles (we suggest picking up at least six to eight) and two Crafter's Square Adhesive Cork Sheets, which totals around $10.
You can use a sheet secured with self-adhesive strips like this Flipside Products Cork Roll or tiles like these Go4Cork Large Square Adhesive Cork Tiles; either can easily be cut down to your ...