Conversation so far:
When was Periyar born?
born on 17 September 1879.
What did Periyar do as a child?
he joined his father's trade at the age of 12.
What did he do at his father's trade?
CANNOTANSWER.

Question: What was Periyar's hobbies as a child?
Self-contained rewrite: What was Periyar's hobbies as a child?