Sorry, forgot to say, we are staying at Diana residence, I usually make sure there's enough for them to do before booking but we have seapped bookings so many times lately, looks as if this one might actually go ahead so though I'd try and find out! The boat trip sounds exactly the sort of thing they like, also the water park, they always come out with us for the evening meal and have a go in arcades/ parks/ night markets that sort of thing, we haven't been to Turkey
