Step by step instructions for making a precast pebble mosaic (cast inside a frame) . stones are grouted, then backed with concrete - great method for creating custom garden pieces! posted by Ward's Island Community Pebble Mosaic Project:
Rhubarb leaves become very nice bird bath and stepping stones. In order to cast a bird bath, you need a large rhubarb leaf and a small or a piece of a leaf, sand and concrete. It is good to have a tarpaulin or similar to be on when casting.