Best way to build a boat out of cardboard

Make a Cardboard Boat: 7 Steps (with Pictures)
Make a Cardboard Boat: 7 Steps (with Pictures)
Building $20 Cardboard Boats! - YouTube
How To Make a Paper Boat That Floats - Origami - YouTube

How build cardboard boat: 13 steps ( pictures, Build flat-bottom boat prevent tipping . lots types boats, flat-bottom boat type construct cardboard stable designs. similarly, wider boat displaces water fare long, narrow boat..

images taken from various sources for illustration only Best way to build a boat out of cardboard