I'm not sure about the easy part but I would love to have this!!!
How to Make a Pebble Mosaic--This is a really clear tutorial.
Rock Wall Art
Make your own cement garden flowers - then paint with DecoArt Patio Paints!! Hometalk :: Create Your Own Garden Flower for Under $5
Homemade kindleing dryer made with cheap cement blocks and 2X4's.
http://www.finegardening.com/design/articles/create-pebble-mosaic.aspx?id=82100 Pebble Mosaic Art Process of making a detailed stone pebble walkway path garden
Garden Sculptures in Montreal
Unique Garden Stone Pots, Water Features and Planters
Rapid Set Cement garbage bag, interior pot, hole in center, medallians added later?
Head planters are a fun way to display trailing foliage and flowers. Not really in to the chia pet thing but this is kind of neat.