I remember watching “A Boy Named Charlie Brown” on TV in the 1970s, not thinking much of it (even as a kid I never cared much for the Charlie Brown movies).
 
Then this came across. Schroeder was among the great pianists of the 20th century. He played the great masterworks on a toy piano with the black keys only painted on. Masterful.
 
https://www.youtube.com/watch?v=KjMd0cjaRaI