Where to go?

Im looking for somewere else other than a caravan club site to take the kids this summer, although the club sites are great we have done these for the past 4 years, and the kids, all boys, are looking for a bit more such as a swimming pool, and entertainment! My eldest is 9, 7, 5 (autistic) and 8 mths, (the TV was broken lol) we live near Ormskirk West Lancashire and looking to travel about 3/4 hrs away, any suggestions would be welcome.