Starting with the base material, make sure you have the right kind of sand. A simple concrete patio can be enhanced with different patterns and colors. Pavers are also good, and they're easy to remove and replace when necessaary. There are various kinds of edging, including flower beds. [There's also extruded edging, but I prefer edging that be be adjusted when you get a new idea or more plants.] Check out more ideas at:
Patio Ideas: Building Tips and Design Trends : Slideshow : HGTV Pro
Sparkle note: If you drag a treat from the box, and click on it again, Sparkle will jump up and catch it!