Neolithic stoneware fragments

How exciting, a few months ago the boys appeared with some pieces of broken pottery that they had found in the sand down on the beach.   We never gave them much thought except agreeing that they were quite unusual.   In fact we just let the boys play with them and then left them on a shelf.   Anyhow, curiosity got the better of me and after a little bit of research on the internet I discovered some archaeological reports of an archaeology  dig done in the 1960s by HK University and blow me, there are pictures of nearly identical pieces of pottery found in Man Kok Tsui that were dated back to the late Neolithic and Bronze ages.   That means the boys have stumbled across pottery that is some three or four thousand years old!!!   Any one know what we should do with the pieces we have found?