After your time serving on Sunday morning, whether holding babies, building blocks, or teaching Biblical truths...PRAY!
I have found that Sunday afternoons were always the best time for me to pray for the children and families that I had just been with. Their needs, sweet faces are still fresh. Be the teacher who prays. You could be the only one who is praying for a particular child.
Take a prayer journal with you each week, record their needs, requests, praises...and follow up. You may be able to point out where God has answered a prayer too!
You are praying to the God who loves you enough and powerful enough to do more than we could ever ask or imagine! Pray.