Huummm I don't know. But what a nice memory of her in years to come. Go over to the Bird Watching forum, they can help you!
Lisa

I had purchased one at an estate sale for $20; it is gorgeous, but didn't hold water (had a large crack, that DH grinded/cleaned out). DH had 'painted' some concrete stuff (I can find out what exactly) on it, and it now holds water, but not for very long (but at least it doesn't leak). I don't think concrete will hold water well in general. But, he did go to the hardware store, and although the paint he was looking at stated it was for concrete, the employee told him that any paint applied to the inside of a concrete birdbath will peel eventually. I don't know if painting the underside will help, or if having it waterproof will hurt it in the long run. We're still researching on exactly what to do, and if I find anything, I'll post back...

Another option is to turn it into a planter. Put a thin layer of gravel in the bottom and fill it with a good potting soil. Then plant some medium tall stuff in the middle and something that will trail around the edges. Choice of plants will depend on whether it's in the sun or shade but shade usually works better for these. It will have to be watered frequently since it's so shallow but it will be an interesting dish garden in the yard. I did this to an old leaking bird bath and it's been a focal point of the yard for many years.

Sandy

I'm wondering if it would work to polyurethane the outside bottom of it, instead of the inside? Also, would it be possible to line it with someone like plastic or a plant saucer??

Been away for a few months...but I'll add my .02 if no one minds.

If you're feeling ambitious, why not purchase some colored glass stones and do a mosaic on the inside.

I've seen them around here for sale..and they're a couple of hundred dollars, but you could do it yourself for next to nothing.