Cat’s Cradle http://www.mathematische-basteleien.de/catscradle.htm
My view on Cat’s Cradle
Matratze, 5 Katzenauge, 6 Schweinchen auf der Leiter, 7 Standuhr The names, which I have
My view on Cat’s Cradle
Matratze, 5 Katzenauge, 6 Schweinchen auf der Leiter, 7 Standuhr The names, which I have
Something about cubes
If you have the choice of the following four drawings most people would choose picture
Tricks with paper strips
I suppose that you have to explain this effect in the same way as a bimetallic bar
Who am I?
Sometimes I am astonished how many pages have already been assembled.
How to fold the Origami-Frog?
I have drawn a line to make this clear. 6 ……
Puzzles with MacMahon’s Coloured Cubes
Cube and mirror cube have mirror images, for instance Ab and Ba.
About squares
Some nostalgia: I still have a calculator from 1971 (Quelle „Privileg“), which has
Description of a new cube puzzle
The violet triangles are congruent and have the sides sqrt(2)/2*a, sqrt(2)/4*a, and
How to make a monogram
Many people who he knew have these pictures with their initials in their home.
How to play with figures of hexagons
Parallelogram Seven tetrahexes have 28 hexagons altogether.