They made their boats out of wood.
wood
wood
wood
Wood
wood
they are made of wood
Rowing boats used to be made out of wood. But due to our more advanced technology nowadays, many rowing boats are made of fiberglass.
so when the kids are board they play with them.
Viking boats (longships) were constructed from wood, with metal fixings (nails, braces, etc).
Papyrus or wood
wood and steel