Beads or pearls + wide ribbon + thread. String thread through a bead and then the ribbon at larger and larger intervals to make the tree shape. Fun Christmas craft, easy ornaments or embellishments for gift wrap.
A homemade Christmas tree card (or invitation or gift tag) that doesn't require special equipment or too much work. Use a lollypop stick (or something similar) as the trunk, ribbon as the branches and a gold star as the topper.