Hi Bob,
I thank the Lord for you and for others who are investing their lives in the next generation.
My advice to enhance the learning is to make a life application out of the lessons through some aspect of ministry. Children can learn to put faith into action at an early age. Just look at the lesson and be creative as to how the children can serve others, and tie the action to the lesson.
For instance, if studying the missionary journeys of Paul, they can write a missionary, or take up an offering for a local mission. If the lesson is on Jesus healing the sick, the children could write notes to a member who is going through cancer treatments, or each bring a flower so you can make an arrangement to take to someone in the hospital. There are other things you can challenge them to do for their neighbors and friends during the week. Ministry opportunities are everywhere. I just think that with every lesson we should ask, How does this apply to me? How do I put this into action?
Through your direction, they will learn to prove themselves doers of the word, and not merely hearers (James 1:24). The other Biblical principle you will be applying is Heb10:24, "and let us consider how to stimulate one another to love and good deeds."
Eventually, you can ask them to think of ways they can express God's love through what they learn in the lessons.
God bless you and encourage you in your ministry to these little ones.