"LSD: A Pschadelic Happening Construction Kit" - can you imagine?!
Just one of the creations you imagine with your LSD building kit! Don't you think it's just a bit reminiscent of the Eames House of Cards?!
"The Hesitant Car" - That is seriously the name of this toy
Building blocks by Bruno Taut - "Dandanah. The Fairy Place"
"Those Blocks: A Mental Puzzle"
Apparently these blocks will create such an obsessive need to find a solution that their owner would be determined enough to pay for a solution. Seems a but presumptuous, don't you think?!
"Naef Versi" - A cube, two geometrical patterns, six sides, endless possibilities.
Mattel "Brain Drain Puzzle" from 1969 - "Bend! Twist! Turn on Your Mind!"