Take your Christmas Doodah and gently remove the Christmas tree decoration from the Christmas card, remember to separate the washer from the Christmas tree decoration. If the decoration is not easily removed you may require a pair of small scissors or a craft knife to cut the tabs that hold it in place.
With the Christmas tree decoration removed . . . display your Christmas card.
Using the twine supplied with your Christmas doodah, pass it through the hole in the top off the Christmas tree decoration, bring the two ends of the twine together and pass them both through the hole in the centre of the felt washer and tie a knot.
Hang your decoration on your Christmas tree, place the knotted twine loop over a branch and push the felt washer up to secure the decoration in place.