The book of Philemon presents some wonderful themes. This is a great study for 3-5 weeks. It speaks, not only of the grace that the Lord has for his children, but of the grace that we should have for one another. Philemon is also an ecclesiastical book, in that it shows the authority that pastors and overseers have over the church body.
The youth enjoy digging deep into the text to see the truths that are hidden within it this very short book.