Anne Voskamp has several books with devotions and Jesse Tree stories. You could use her details and incorporate them into your lessons and the lesson ideas shared above.
Check out her page here: http://annvoskamp.com/thegreatestchristmas/
There are links from there to pages with pdfs of ornaments you can print and color: https://s3.amazonaws.com/a.vos...ments-4+per+page.pdf
The amazon.com description of Unwrapping the Greatest Gift: Based on the overwhelming success of The Greatest Gift, Ann Voskamp has expanded her presentation of the timeless Advent tradition of the Jesse Tree so families can celebrate together. Each day, families can read the provided Scripture passage (in connection with the original book), engage with a specially written devotion to help children of all ages understand the Advent theme for the day, and participate in suggested activities to apply the theme. https://www.amazon.com/Unwrapp...;keywords=jesse+tree