Step 1: Gather Materials
-Water proof Tape (duct tape is best)
-Box Cutter/ Scissors
-Something to draw with
-An idea and necessary decorations
Step 2: Get a basic shape
Draw out the basic shape, then cut it out.
Step 3: Create the walls.
Line up the walls to the base. If you are going around a curve then mark it. Score the line and fold it so it goes around the curve. Keep doing this until you run out of cardboard and tape it down inside and out.
Tape all the sides on and any walls that need to be taped together.
If the base of your boat is sticking out, cut it off before taping it.
Step 4: Strengthen it.
Take strips of cardboard that are about 4-5 inches in width and score them in half. Then fold them so they create a 90 degree angle and tape them on the bottom inside of the boat.
To strengthen the sides on the top, get another piece of cardboard the same size as your boat. Cut the cardboard so it has tabs connected to the sides (see picture). Fold tabs around the sides and tape them. Attach with tape to the top of your boat.