Under "Everything connects"...while researching Etch-a-Sketch; a footnote comparison

[Mark Kohut]

The Mystic Writing Pad (also called Wunderblock), an old childrens toy, which can be used for writing or drawing. Consisting of a thin sheet of clear plastic covering a thick waxed board. Sigmund Freud referred to it as a metaphor in his concept of the unconscious. 
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