You can get your children involved by drawing pictures to include in the letters.
USO also has a book drive for the service men and woman to send to their families. Donated books are sent to the troops, they then make a dvd of them reading the book and the dvd and book are sent to their family members.
I think this is such a touching thing to do and will certainly be picking up a number of books to send. To find out more on this opportunity please click here.
*Please note that I am not a spokesperson for these organizations, nor do I have any affiliation with them.