"As far as the sensory experience of the spectator goes, the most outstanding American kinetic artist is unquestionably the Chinese-born Wen-Ying Tsai. His pieces, which are perfect on the technological level, serve the primary purpose of giving a complete visual experience to the spectator, whose sound solicitations provoke a choreographic, chromatic and rhythmic response in the ‘cybernetic sculptures’. [...]"
January 1, 1970
https://en.wikiquote.org/wiki/Frank_Popper