More natural building materials

Things like bamboo posts, grass, thatch, palm leaves walls, ceilings, thinking Gilligan's Island, African safari villages. Structures not as solid, material "flow" in the winds. Deliver in fronds, sheaves, etc. Would have to harvest from the fields and forests for materials. Add bamboo trees. Also be able to construct tents of canvas, like a M*A*S*H tent, with sticks and sheets of canvas.