Go to Turkey. You will not regret it at all! Fab place fab people and they truly welcome kids.
A great place is Hisaronu which is near the famous Olu Denize lagoon that epitomises Turkey in all their advertising.
Hisaronu is up in the hills so is cooler than the beach. But it is only 10 mins away in the local minibus every 5 mins and cheap too.
Hisaronu has everything you want with loads to do nd loads to eat.
I know . We liked it so much we bought an apartment there last year!
There are some good hotels. Look up ASCENA VILLAGE. this is run by Thomson and is not at all bad. We have had some great times there.
http://www.oludenizbeach.com/main.html
http://www.oludenizpost.com/default.asp
http://www.hisaronu.co.uk/
Let me know if you would like any help or more info.