My frugal tip would be "Enjoy your local library". We don't pay for books, magazine or tv - we get all of these at the library. Bonus is you get to return them at the end of the week and they don't clutter your house. Also it is a free Saturday afternoon activity which the whole family can enjoy.
The same idea applies to toy-lending libraries - just borrow, don't buy. A new and different toy every week to keep kids interested.