HOW TO: Build a Sand-Cast Birdbath. Looking for a simple project with lots of potential? Try this sand-cast birdbath — it's easy to make, works with any large leaf and a bag of concrete, and can be finished a number of ways.
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.