We went to Akyaka with our daughter and her family a few years ago. My grand daughter was about 15 months at the time. The beach is perfect for toddlers, sand that is perfect for sand castles, the sea is very calm and shallow for a long way out.
I don't know if there are any AI hotels there though, and as Kedi said you have to be careful in Turkey about cheap AIs' because they really can be poor quality.
We stayed at the Yucelen which is right on the beach, and was very good. Very pretty gardens with little streams running through them, and plenty of ducks around that your daughter would probably enjoy feeding!
I see that the Yucelen is number one on Tripadvisor - so probably still good.
Have a good holiday wherever you choose!
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Apartment rental in beautiful area of Turkey, perfect location for a wonderful holiday
http://www.turuncapartment.com