Don’t you admire the families that have the time to teach their children the old hymns of the faith?  Don’t you wish you could be like them?  You can!  Get some hymnals and look through them to find the hymns you would like to learn.  Make enough copies of each hymn for each member of your family (older hymns are usually not copyrighted).  Next time you have some time in the car or during family devotions, get your folder of copied hymns out and pass them around.  It really does not take long to learn them.  Sing the same hymn or two every day--before breakfast is a good time.  In one month even the little ones will know most of the hymn.  You many want to set one day a week aside for review of hymns.  Perhaps Saturday mornings before breakfast you could choose two hymns to review. 

Let the children record themselves and you’ll be surprised how many times they will want to sing it!  Give the recording to grandparents for a cherished gift.  You might also want to buy a book of hymn stories that tells the background of each hymn.  Read the background to the children and let them act it out.  This will make the hymn come alive to them.