I don't know where I came across these bedtime blessings for kids but I love them. You can just fill in the blank with your child's name or even your own name and pray Scripture blessings on them/you.
Thank you, God, that You are our refuge and our strength a very present help in any type of trouble. May _______ be still and know that You are God, may _______ lie down and sleep in peace for you alone, O Lord, make ___ dwell in safety. (Psalm 46: 1, 10, Psalm 4:8)
_______, may you go to sleep tonight thinking about things that are true and honorable and lovely and worthy of praise. And as you keep your mind fixed on God and trust Him, may you be kept in perfect peace, knowing the peace that Jesus gives so that your heart will not be troubled and you will not be afraid. (Isaiah 26:3, John 14:27, Philippians 4:8)
_______, may you rejoice in the Lord always. Rejoice! Because the Lord is near, may you not be worried about anything but in everything, seek God with thanksgiving. As you sleep, may the peace of God, which goes far beyond all understanding, guard your heart and your mind in Christ Jesus. (Philippians 4:4-7)
_______, may you seek the Lord who answers you and delivers you from all your fears. May your face be radiant and never ashamed as you look to Jesus and may the Lord hear you and save you from all of your worries. (Psalm 34:4-6)
_______, may the Lord bless you and keep you; the Lord make His face to shine upon you and be gracious to you; the Lord lift up His countenance upon you and give you peace. (Numbers 6:24-26)