Catholics traditionally leave the Child out of their Nativity scenes until after Midnight Mass on Christmas Eve. This prayer, in which we humble ourselves before the Savior of the World, born as a Child in a stable, is the perfect prayer to accompany the placement of the Child in the manger.
The entire family can recite the prayer together in front of the Nativity scene. It's also a good idea to print a copy to keep near the manger until you take it down, so that you can pray it frequently throughout the Christmas season.
Prayer to Jesus in the Manger
O Divine Redeemer Jesus Christ, prostrate before Thy crib, I believe Thou art the God of infinite Majesty, even though I do see Thee here as a helpless babe. I humbly adore and thank Thee for having so humbled Thyself for my salvation as to will to be born in a stable. I thank Thee for all Thou didst wish to suffer for me in Bethlehem, for Thy poverty and humility, for Thy nakedness, tears, cold and sufferings.
Would that I could show Thee that tenderness which Thy Virgin Mother had toward Thee, and love Thee as she did. Would that I could praise Thee with the joy of the angels, that I could kneel before Thee with the faith of St. Joseph, the simplicity of the shepherds. Uniting myself with these first adorers at the crib, I offer Thee the homage of my heart, and I beg that Thou wouldst be born spiritually in my soul. Make me reflect in some degree the virtues of Thy admirable nativity. Fill me with that spirit of renunciation, of poverty, of humility, which prompted Thee to assume the weakness of our nature, and to be born amid destitution and suffering. Grant that from this day forward, I may in all things seek Thy greater glory, and may enjoy that peace promised to men of good will.