Designed and diagrammed by David Shall
Fold this tree from US currency or any paper with the same shape, ratio approximately 3 X 7. A method to fold a square from which to cut 2 dollar shapes may be found in my book Papercopia, pp. 78-79.
The model makes a nice, seasonal restaurant tip that you can collapse flat to carry in a wallet, then re-fold its stand to leave at your table. Or, make yourself an evergreen forest!
You may fold and teach this model non-commercially; please contact me for other permissions.