I got this tree at Sister Ruth's store, the Hope Chest. When I was paying for it, the cashier, Gary, asked me why was I buying a Charlie Brown Christmas tree. I explained that I wanted it for a Jesse Tree. I also just sent him a slide show of us making it.
Jesse was the father of King David of the Old Testament. He is often looked upon as the first person in the genealogy of Jesus. The ornaments show the relationship of Jesus with Jesse and other biblical personages. The various branches have pictures of other Old and New Testament figures who were ancestors of Jesus. At the top of the tree is the birth of Jesus.
I used figures from the internet. Sorry, I can't remember where. Just google Jesse tree, and I'm sure you'll find some. We colored them, cut them out, and hung them.
The idea is to read the scripture verse each day, on the appropriate ornament. You start the first day of Advent, and continue until Christmas.