For younger children give them old Christmas greeting cards. Let them cut pictures from the cards and place on a piece of of poster board cut to be used as a place mat. (It could be cut in the shape of a bell, tree or Santa's hat. Anything you like) Glue or tape pictures to hold in place and cover both side with clear contact paper or laminate......For older chidren you can give them photo's of themselves from past Christmases....
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"Duct tape is like the force. It has a light side, a dark side, and it holds the world together."