DIY - Glow in the dark pots with mums for fall/Halloween. Buy a flower pot that you really like and use Rustoleum's Glow-in-the-dark paint to paint the pot. During the day, the paint will absorb the sunlight and at night the pots will glow.
Build a patio/deck cooler stand. This patio cooler stand is made from cedar decking. to be exact. It holds a 48 quart Igloo cooler. The top is hinged, and the cooler cover is mounted within the top. Bottle opener, and cap catcher complete the case
Great idea for a large back yard: Use solar lights. They aren't just for the ground! Cut into squares to fit the existing fence posts. Using galvanized screws - not nails - to screw a "L" bracket to the underneath base. Then on top, screw on the stake.