It's 30 tl for adults and 10 tl for kids over 4. Harry has just turned 5 so we cheated. The food and drink was not overly expensive and regularly in the afternoon they have two for the price of one sessions for beer, soft drinks and ice cream. I like the system where you pay in some credit and they give you a card for all purchases inside. You can top it up if required or get a refund if there's owt left at the end.