Sewn boat

Imagine a really big bathtub, but instead of it being made of porcelain, it's made of wood. And imagine that it's not quite round, but more like a banana. Now, instead of a faucet, we have a big hole in the bottom of the boat. The boat needs to be able to float on water, so it needs to have walls that hold water out. The walls are made of strips of wood, called planks, that are sewn together with string or rope.

Let's pretend that we are building this boat. We start by making a big wooden frame that looks like a ribcage. This frame is called the skeleton of the boat. We attach the planks to this frame and then sew them together with a needle and thread. The thread used is not like the thread used for sewing clothes, it is much stronger and is made of things like coconut fibers or leather. The thread is sewn into holes that are drilled into the planks, and then tied to hold the planks together.

After the planks are sewn together, the boat is coated with a tar-like substance that makes it waterproof. This means that water won't come inside the boat through the seams. A hole is then drilled in the bottom of the boat so that water can drain out.

This type of boat is called a sewn boat because it is held together with thread instead of nails, glue or screws like other boats. These sewn boats were often used by ancient peoples who needed to travel by water but didn't have access to metal or tools to make more complicated boats.

So, in summary, a sewn boat is a large wooden bathtub-shaped boat that is held together with thread and sewn planks. It keeps the water out by being coated with a tar-like substance and has a hole in the bottom to let any water that does get inside back out.