If the little ones have been bugging you to build a fort, check out the Pirate Hideaway Tree House ($26,000). This assembly-free, deluxe tree house comes with its own 6-feet tree log reclaimed from local ranches and features a sturdy construction with Douglas fir framing and cedar board siding. Other kid-approved additions include a roomy clubhouse floor, mast with crow's nest and pirate flag, skeleton figurehead, fireman's pole, belt swing and more.