Cruise lines that including you to Kusadasi, Turkey make you enjoy your time. Since Turkey has 6 moths sunny weather you have a lot of time to travel there. If you join a tour including Turkey, you should ask for Kusadasi and do not worry about what to do there. There are a lot to do. Please read the "must-dos" in the following link:
http://www.kusadasi.biz/info/guide/must-do
You can also visit the fun center Adaland's website:
http://www.adaland.com/index.aspx