John's Pizza (44th St near 8th Ave) is very noisy, but the pizza is good and the space (a converted church) is interesting.
My kids also liked Bubba Gump's--around 44th St. & Broadway--a touristy place,and pricey, but the food is surprisingly good. Of course, it helps if they have seen "Forrest Gump" so they can "get" the decor and menu items. Beware of the gift shop!
There's also Dallas BBQ on 42nd between 7th & 8th. I believe they closed for a while and then reopened; I haven't been there since then, so I don't know if it's still good, but when I was there the food was very good.Another very large, noisy place (but not quite as noisy as John's.)
Of course, my favorite place to eat before a show is the Edison Cafe in the Hotel Edison (47th between 7th & 8th)--usually calm, a theater district landmark, good "diner" food--but it might not be "fun" enough for kids?
Karen
Maggie-the-schnoodle