I had been considering putting out a bird bath for a while when I came across this solar fountain on Amazon for under $20. (Click here to purchase on Amazon - As an Amazon Associate I earn from qualifying purchases.) It was irresistible! A fountain water feature for my lawn and it runs on it's own solar panels! I got a plant tub and filled it with water from my rain barrel - and top it up every few days. The sound of water tinkling is delightful.
I installed toothpicks into the foam edge to keep the fountain centered so the water does not get thrown over the edge.
It comes with different nozzles for various spray shapes and just floats perfectly on the water. When there is little sun due to clouds or time of day, it pulses in little squirts, but in full sun the fountain goes up over 12".