Make a Duck Tape® fabric piece using two Duck Tape® sheets and/or Duck Tape® stuck together sticky side to sticky side.
Make two double sided strips of Duck Tape® that are 10 in. long.
Make a double sided strip that is 8.25 in. long.
Make a double sided fabric using two Duck Tape® sheets and/or Duck Tape®. Cut a piece from your fabric that is 8.25 in. wide and 4.75 in. long.
Assemble your pieces together. Attach both step 1 pieces with the piece from step 3. Take one of your step 1 pieces and attach the strips from step 2 to both sides of it. Then attach your step 4 piece at the top.
Fold up your bag. Step 1 pieces will be the front and back, the step 3 strip will be your bottom, and the strips from step 2 are the sides. Step 4 strip will be your flap. Attach using strips of Duck Tape®.
Make two thinner double sided strips of Duck Tape®, measuring the length you want for your straps.
Attach your strips from step 7 to your bag and fold down your flap.
Make ears using a double sided strip of Duck Tape® and cut out your ear shape.
Add more details to front of your backpack, including eyes and a nose.