He talked about the importance of play to reduce stress and anxiety levels.
Mr Biddle joined Toast-masters in 2010 and is a member of Rotorua's Lunchtime Toastmasters Club. He has previously competed in the international event but this was the first year he had been placed.
When the Rotorua Daily Post spoke to him yesterday he was relaxing in his hotel room in Cincinatti and dealing with a hoarse voice after performing two hakas following his seven-minute speech.
"I feel fantastic. It was a really hard competition ... I'm extra proud to be a son of Rotorua."
Mr Biddle said he had already been asked to speak in Dubai and his next goal was to bring home gold from the international speaking competition.
Presiyan Vasilev from Bulgaria took out first place and Shurooq Albanna from the United Arab Emirates came in third.