Have your kids make a special stocking and label it "Jesus". Hang it in the center. Explain to them that during this month every time anyone in the family does something nice, the kind act will be written on a piece of paper and placed in the stocking. Perhaps a note a day. On December 24, the whole family gather together before the manger and present the stocking to the baby Jesus in the crib in thanksgiving for His amazing love for the world!
It's ok to dream ahead, I guess! :)