This is our Jesse Tree. Since flat space is at a premium around here with all the nativities, we put it on the wall. Each ornament symbolizes something in salvation history and the booklet that goes along with it gives Old Testament and New Testament readings. These, as well as instructions on making your own ornaments can be found here. The easiest way to do it is to get a group together from friends/family/church and have each make numerous copies of one ornament, then have a party to exchange them.