Drink Umbrella Wreath - Here is a great fun idea for a summer wreath for your front door. Get a Styrofoam wreath and stick a ton of fun drink umbrellas in them. This would be so great to put out while hosting a luau or summer swim party.
DIY Paper Lantern Jellyfish
Cocktail Umbrella Light The designer suggests affixing the paper umbrellas to a rubber ball; using a paper lantern (preferably that already has a light fixture attached) would be easier.
Get Inspired: 15 Fabulous DIY Summer Wreaths
Glow sticks in the pool, great for night swimming! Not sure this would be the best idea for a big in ground pool (would probably take a couple hundred sticks), but would definitely be cool in a kid pool or an above ground pool!
Parasol topiaries - Great for Pool Party, Beach Party!
Gazebo decor - colorful ribbons, lanterns and twinkle lights? Add colorful ribbons to white paper lanterns! White gauzy fabric draping the pillars.
Tropical Leaf Paper Garland
Great fun idea for an outdoor "cooler". DIY cooler from wading pools.
DIY Beverage & Paper Goods Station~ so easy to make and could be used for any event from a BBQ to a Holiday get together. And the paper goods can be switched by color so easily for any event.