Your question has pretty much been answered, but I disagree with the people who say don’t eat at the etreet vendors. I lived in Izmir for 3 years and ate lunch every day at street vendors. Just use your head and I agree about the bottled water for the kids. I drank tap and was fine but why risk it with little ones. Turkish pizza is great and so are the donars (sandwiches with meat and other stuff). My sons were 6 and 3 when we moved there, Turks love children, so be prepared to see strangers who want to touch and sometimes hug your kids.Enjoy Turkey, it really is wonderful and if like history, get ready for lots of great side trips.