If your kids still have the "Wimbledon" bug then this summer holidays they may be able to have a game of tennis for free in your locality. Tennis for Free has a great search facility on its site for you to find tennis courts that you can play on for free. Just enter your postcode in the search box.
There is also free coaching on offer, but unfortunately this seems mainly to be in the London area only.
More ideas for Happy frugal holidays!
Such a gas bag
13 hours ago