Conversation so far:
what did Alexander Graham Bell  experiment with that had sound ?
Automaton
How did Alexander Graham Bell make the automation head work?
Alexander Graham Bell and his brother would carefully adjust the lips and when a bellows forced air through the windpipe, a very recognizable Mama ensued.

Question: how old was bell when he invented that?
Self-contained rewrite: how old was Alexander Graham Bell when he invented an automaton head?