Save money when you go out for the day

I find that even if I go out somewhere that is free to go in I always end up spending out on drinks and food. The best thing is to be prepared and take drinks for you and the kids as well as a picnic and lots of extra snacks as they will get hungry as they are bound to burn off more energy than usual. Otherwise I find that I end up spending nearly £20 a day just on drinks, snacks and lunch.