Question about a blu-ray dvd....

[jam24]

These blu-ray disc dvd's are new to me and my son got one for Christmas from a family member that didn't know much about dvd's, just knew which movie he wanted and that it was a dvd. He opened it and him and his sister put it in her dvd player, not a blu-ray dvd player, and of course it didn't work. They told me about it and showed me the case and I told them that it was a blu-ray dvd and it would probably not work on any dvd players that we had. I was wondering since they put it in a regular dvd player and tried to play it could it have damaged it? Because if not I want to sale it because we can not use it. Thanks for any help.