Roof-top cupolas can be used for both decoration and ventilation. In the days before roof and ridge vents, a cupola was the most effective way to ventilate a stable, barn or even a house, and with new, rot-resistant materials they still work well. Get free do-it-yourself building plans from The Family Handyman Magazine
Build a Wooden Bench for Less- Assemble this sturdy bench from two 10-foot 2x8s, glue and a handful of screws. A novice can complete it in a few hours. Need outdoor seating in a hurry? This simple bench, based on author and ecologist Aldo Leopold's classic design, can be constructed in a couple of hours. All it takes is two boards and 18 screws, for a cost of less than $25.