We needed an activity for our 9 year old daughter while Dad and her brother went to the Knicks game. We booked a Broadway tour for she and Mom, and they had a great time.
Even on a bitterly cold day--kudos to the tour company for supplying the handwarmer packs!--the tour was a big hit. There was plenty of information, but not presented in a boring way. Having the guides be active members of the acting community is a smart move, because they know some of the details that average visitors like us want to know.
Very reasonably priced for what you get, and very good communication in advance of the tour to make sure everything is clear. It's designed for adults, but if you have older kids (say, older than 8ish) who are interested in shows or know even a little bit about Broadway, they'll enjoy it also.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.