[header] How to make a duct tape backpack [title] Cut a piece of duct tape 15 inches long. [step] Lay it down on a table, sticky side up. Continue to cut multiple pieces of duct tape that are 15 inches long. 
Each time you cut a new piece, lay the non-sticky side onto the sticky side of the duct tape already on the table. Overlap the pieces about 1/2 inch.