Donate to a Good Cause
Find a cause that's meaningful for you and your children. Kids might be interested in a charity that provides medical care for other children, like Operation Smile, or a local pet rescue organization. Set aside a "giving jar," in which everyone puts spare change (kids can donate part of their allowance). When the jar is full, count the money with your children and write a check to the charity.
You might also have a "clean-out" day, in which your child picks out the toys, books, and clothes he or she no longer needs. Together, choose a local charity or hospital to receive the items. These are just a few of the many ways you can involve kids in giving.