Looking for recommendations please. 4 of us, including a 2 and a 4 year old. Will be for summer holidays next year (school hols sadly!) and will need to be reasonable in price. Lots to do in local area. We are city folk so want something with lots of animals, walks, castles, needs to be child friendly and would be amazing if there was something like babysitting available so we can wangle 1 night off (this may be a pipe dream). Could be anywhere in the UK really, although 6 hours drive from London is probably my limit (but willing to extend). Don't mind in which direction. Obviously needs to be stuff to do if there weather is crap as well as lovely outdoorsy stuff. Any recommends? TIA.