Appendix 3.
Impossible figures from wood and paper

Some paper constructions which can be glued have been designed by Kokichi Sugihara which works in the Branch of Computer Science of Tokio University. You can see these constructions below. If you want to make them by yourself then download PDF-document corresponding to selected construction, open it with Adobe Acrobat Reader and print it. You can download Acrobat Reader from http://www.adobe.com/products/acrobat/main.html.