One of the most influential Christian books in all of history is the Pilgrim's Progress by John Bunyan. I have read the book numerous times and each time I have been spurred on in my walk with the Lord. In this article from TGC, Ginger Blomberg gives us three new versions of this classic for our kids. I highly recommend we read this beautiful allegory to our children.
Here is the link to the article which provides links to purchase all three of these modern reprints for children... https://www.thegospelcoalition.org/reviews/pilgrims-progress/