There may be some ornament making materials just waiting to be taken out to the recycle bin. Those holiday tissue boxes sometimes have decorations the right size for tree ornaments. The pretty picture just needs to be cut out, a hole punched, and a piece of yarn strung through the hole for a simple tree ornament.
Backing can be glued on or not.
This snowman was cut out of the Holiday Prints from Safeway® Softly® Gallery® facial tissue.