Several years ago I made concrete paving stones using a mold that I bought from a woman here in Portland who designs wonderful molds for garden stepping stones. I made enough to incorporate them into our expanded patio.
The last time you saw this hen she looked pretty sad. I got rid of the nasty, dead geranium and gave her a primrose too.
And I did find another mold at another shop this afternoon. These are the nicest I have seen. Most of the molds I have seen are very poor, cutesy designs. You can order them from the website if you can't find them in a store. This is the one I ended up buying. I thought it would go well with the fish.