Conversation so far:
Where was Moondog born?
Episcopalian family in Marysville, Kansas.
Who were his parents?
CANNOTANSWER.
What was his career path like ?
losing his sight at the age of 16 in a farm accident on July 4, 1932, involving a dynamite cap.

Question: When did he start playing music ?
Self-contained rewrite: When did Moondog start playing music?