Decorate a Christmas Tree.
If you haven't already decorated your Christmas tree, go ahead and decorate it! If you have done it, or are waiting until later in the month, get a small tree to decorate for each child's room.
Craft and discount stores sell small trees that fit onto a dresser or nightstand perfectly. Let each child decorate their own tree with popcorn strings, tinsel, homemade ornaments or dollar store decorations and lights.
Let the tree be a nightlight in their room throughout the Christmas season. Even the older kids will love falling asleep to the twinkling of Christmas lights in the dark.