Any material that will float, such as wood or plastic.
plastic because if you use metal it would be heave and if you use wood it would brake and glass would be dangrous
Fibre glass is a good material to make boats it is a mixture of glass and plastic.
Frabic
Add flotation material to it, like sprayed polyurethane foam.
Yes it does because depending on the materials of the boat and how much their mass is can change the buoyancy of the toy boat. Boat can be designed to have less volume in order for it to have less density and be able to float. So if the material's mass is alot if can make the boat sink. If the material's mass is not alot then it can help the boat float. If the shape is designed to have more volume than mass it will float. If not then it will sink.
The best building material for cabinets would be a hard wood like pine. The pine wood would bring a style to the cabinets and also make them very sturdy.
round
Teak wood
Add flotation material to it, like sprayed polyurethane foam.
There are many material you can use. The best material is fiberglass, but metal and wood are good substitutes.
The best way to sell a boat on Craigslist is to include all important information about the boat. Include, make, model, pictures of the boast, price, and details that make your boat unique.