Bird baths are expensive, but some pavers and a plant saucer have given me endless hours of enjoyment.
This might be a common tip, but a valid one with record heat waves in the US and Europe. Birds like shallow water, low to the ground. This cost me <$30 and I've seen dozens of species of birds visiting (ranging in size from hummingbirds to Cooper's hawks), plus cats, squirrels, chipmunks, opossums, and more. This is just a shady, weedy corner of my backyard.
In the picture is a robin, which is common in central PA. #finance source