Five days a week he's at school and four nights a week he's at sport.

In his spare time, he makes international headlines and a bit of money too. Welcome to life as Canberra's youngest chief executive.

The Jerrabomberra tween's world "exploded" when he won a national children's innovation competition in 2015.

Since taking the title at Origin's littleBIGidea contest with his diabetes test strip removal device, the St Edmund's College year 7 student has visited NASA, started company Diabetes Domination, interned with Muffin Break and attracted national and international media.

He will this week travel to DigiCon in Melbourne as one of four keynote speakers.

"We are proud of him," mother Liz Kobald-Grame said.

"He's a red-hot little inventor and he's always looking for opportunities - in fact, he's ready to start working on his next invention for the competition this year."

Applications for Origin's littleBIGidea competition are open to budding inventors in years 3 to 8 until September 15.

Children are invited to summarise their idea in 200 words or less, describing what their idea is, what problem it is designed to solve, and how they came up with the idea.

William's invention was designed to help stop him getting in trouble for leaving blood glucose test strips scattered around the house. The 3D-printed device fits into the testing kits used by people with diabetes and can be disposed once full.

Diabetes Domination - so named because "I like to dominate diabetes and I don't let it dominate me", William explained - offers the product to people Australia-wide. He's sold about 1000 including some to customers in the United States.

Money made goes back into the company, though William said he hoped to buy a Lamborghini for his 18th birthday.

William said his next invention would also help him keep out of trouble but he chose to stay quiet on what it was. St Edmund's science and English teachers have been enlisted to help him take the top spot.

He encouraged other Canberra children to try their luck in the contest.

"Don't give up, have a go, and any idea isn't a bad one," he said.

Visit littlebigidea.com.au for more information. Inventors behind the top 12 ideas will receive $1000, a spot in a design workshop and support from an industry mentor. The best invention in each of the three age categories will win their creator a trip to NASA in the USA.