Balsa is a lightweight WOOD that is commonly used in the construction of rafts, model airplanes, and other items. It is derived from the balsa tree, which is native to Central and South America. The WOOD is soft and easily worked, making it an ideal material for crafting. Balsa is also buoyant, making it an excellent choice for constructing rafts. Its light weight also makes it suitable for use in model airplanes.