This is where he regularly trains each week and his hard work has paid off.

This week Shawn will fly to Harbin, in the north of China, where he will represent Australia at the gridiron World Championships.

Stewart is one of 42 boys from across the country chosen to play in Australia's 2016 International Federation of American Football Under 19 World Championships team.

Stewart is humble about being selected for Australia's under 19's gridiron team and excited to be representing the nation.

"I'm pretty proud to get the opportunity to play for Australia, not many people can say they've played for the country, so I'm pretty stoked," Stewart said.

During their three weeks in China, the team will first compete against Japan and Denmark.

Stewart said if the Australian team manages to win a majority of their games, they could end up in the finals where they will most likely verse world number one, America.

When he's not playing for Australia, Stewart plays for the ACT Centurions.

Queanbeyan doesn't have its own team so he has to go across the border to play. Three other players from the ACT and surrounding region were picked for the team, Dale Haskew also from ACT Centurions and two players from ACT Firebirds.

"One of them I play with and two of them I play against, so not going up there [to China] alone is quite exciting, I can't wait for it," Stewart said.

Shawn Stewart's dad described his son as a "big teddy bear", but he is far from that on the field.

Stewart has been been playing gridiron for just over two years and already is playing with the best in the nation.

Shawn Stewart's dad, Derek Stewart said his son has always been into sport.

"He's always had a passion for playing team sports," he said.

"He's a very good team player, he's not individual, he loves to be in a team that will utilise him and likes to rely a little bit on him."

Before gridiron, Stewart played rugby union since under 8s and started rugby league around the age of eight or nine.

He is no stranger to travelling for sport, at the beginning of 2015 Stewart also flew to New Zealand to represent his school in rugby union.

It was Stewart's brother who originally got him into playing gridiron.

"His brother has been in it [gridiron] for seven years and that's who really got him to come over and play," said Derek Stewart.

Derek, like any father in his situation, said he's extremely proud of what his son has achieved.

"It was a proud moment when he got picked, because representing Australia in anything I think is a great achievement," he said.

"There wasn't any expectation, I said to him, 'Go and give it your best shot mate. It will be a great thing if you get in, but even if you don't, don't worry about it.'"

Their first game will be against the host nation on June 29.