The Sprout Tree House is a grandchild and neighborhood favorite. A two story 'fairy' house complete with a spiral staircase wrapping the tree, lookout blind, swinging rope bridge, hidden peepholes & birdfeeders, and a rope pulley to bring up goods! - Classic back yard tree house touches. This classic tree house, however, is professionally built from the trees up with longevity, safety, and tree health in mind. South Burlington VT 2011.