Kid friendly near Opera House
Are you talking about dinner or lunch? Also, what price range per person?
The Opera House is very close to Chinatown. There are a number of larger restaurants there that could easily handle a group of that size....ChauChow, China Pearl, and Empire Garden all have plenty of seating... The kids could get standard American Chinese fare and others who want to be, can be more adventerous. If you go during lunch time you may even be able to get Dim Sum.