If you have a zoo near buy, consider buying a zoo membership to save money and have fun. While admission tickets seem quite expensive if you are going for the day, family memberships are usually very reasonable.
Instead of taking the kids to the funfair on holiday, spend time on the beach with them. A little tent is ideal for putting up and stowing all kinds of things. A donkey ride is just as much fun as many of the kids rides - and a lot cheaper and greener too.