Dan Kimball is a grown-up who likes to talk about Jesus and teach other people about him too. He's like a big brother or uncle who wants to share all the cool things he knows about Jesus, but he does it in a way that's easy for little kids to understand.
He wrote some books that are like big stories about Jesus and how you can follow him. They're kind of like the bedtime stories your mommy or daddy reads to you, but they have an important message about God.
Dan also used to be a pastor which means he worked at a church and helped people understand more about God and how to be good and kind to everyone. He would talk to people and listen to their worries and problems to help them feel better and know that God loves them no matter what.
Overall, Dan Kimball is a kind and helpful person who loves Jesus and loves to share that love with others.