Years ago, Michael Fieldhouse had a dinner party and friends attended with their young son Andrew, who is autistic, non-verbal, and low-functioning. At one point, Fieldhouse noticed Andrew, who was five- or six-years-old at the time, outside dropping pebbles into an urn in a Japanese garden.
"I was curious about that and I started timing him," recalls Fieldhouse. "I noted there were perfect intervals between every stone. He did that for at least an hour."