I think your best bet would be to poll the kids to see if it interests them.
I really enjoyed it, horses, knights, jousting, sword fights, eating with your hands and lots of ale... what's not to like!
My DW and DD... shall we say... not as "enchanted" as my sons and I. They didn't dislike it, but didn't get into the experience like the guys.
Personally I would do it again, as would my sons (now 25 and 27 YO), my wife says yes but my daughter is giving me the thumbs down when I ask her the question
It's a well rehearsed show and makes you feel like you've stepped back in time. Food is basic Renaissance fare but tasty (and did I say, you get to eat with your hands) but I would definitely ask the kids before you book.