Lay the sticks, straws or pipe cleaners parallel to one another, lining up the ends. Wrap the string tightly around each pole in turn, a few inches from the top, keeping them parallel and close together so that they still touch when laid flat. Gather the poles in a bundle. Wrap the free end of the string around the whole thing and tie it securely. Splay the poles out and adjust them until they balance in a cone-like teepee formation.