Toy piano

John Cage
Wikipedia - "The toy piano, also known as the kinderklavier (child's keyboard), is a small piano-like musical instrument. The present form of the toy piano was invented in Philadelphia by a 17-year-old German immigrant named Albert Schoenhut. He worked as a repairman at Wanamaker's department store, repairing broken glass sounding pieces in German toy pianos damaged in shipping. Schoenhut conceived of the toy piano as it is known today in 1872, when he substituted durable steel plates for the traditional fragile glass bars."
Wikipedia, YouTube - Suite for Toy Piano, John Cage, John Cage, YouTube - John Cage : Suite for Toy Piano (in Zen style?)