Our theme is Super Heroes (Bible Heroes).
I highlighted that Jeremiah was young but God used him for something amazing. I then related this to the children that God can use them now and today! They are not too young!
Here is a simple resource I put together for this:
Jeremiah’s Call and First Visions
4 The Lord gave me this message:
5 “I knew you before I formed you in your mother’s womb.
Before you were born I set you apart
and appointed you as my prophet to the nations.”
6 “O Sovereign Lord,” I said, “I can’t speak for you! I’m too young!”
7 The Lord replied, “Don’t say, ‘I’m too young,’ for you must go wherever I send you and say whatever I tell you. 8 And don’t be afraid of the people, for I will be with you and will protect you. I, the Lord, have spoken!”