⚔ Making a boat from a single 2x4 [HD]

This was my entry for Summers Woodworking Creative 2x4 Competition 2015 The rules said I can use a real 2x4, so my 2x4 was 5cm x10cm and 8 feet (240cm) long. The rules said also I can use 10% other material, this is the reason why I covered it with this