We always pray with our kids before they sleep. After Conrad and I went to a great Parenting Conference put on by Focus on the Family, we started praying Numbers 6:24 over our kids each night as a blessing. And when you think about it, it really does cover all of the bases: "May the Lord bless you and keep you. May His Face shine on you and be good to you all of your days. May the Lord turn His face upon you and give you peace."