Just two years ago, Lizzie and Darryl Scoble watched helplessly as their three-year-old son lay struggling to breathe in the back of an ambulance racing to hospital.
Relief at making it through the emergency department doors turned to grief when doctors told them the horrifying news - their son was dying from kidney and heart failure.
After a gruelling year - in which Jack Scoble spent up to 13 hours a day hooked up to machines to keep him alive - the Gold Coast couple were given hope.
"It was such a shock," Mrs Scoble said. "We weren't expecting any news to come through for Jack but then the specialist called and said, 'We've got a donor'.
"We almost died ourselves."
Fast forward to today and, after the kidney transplant, you can hardly notice any trace of the sick boy who struggled to walk.
Now Jack, 5, is running and climbing like all boys his age.
And when he heard about the plight of another boy living half a world away, he decided he wanted to send him a message of hope.
Matthew Pietrzyk, 7, from Leicestershire in Britain, was born with a rare genetic disorder that damaged his kidneys.
His mother Nicola last week uploaded a picture of Matthew to Facebook, appealing for a million people to "like" the image in a bid to find a donor and raise awareness of the need for organ donations.
Jack saw the page and told his parents he wanted to talk with Matthew.
They decided to record a video message, which they posted to Matthew's parents' Facebook page.
The video has had more than 1000 views and 150 shares and the story hit the British media, catapulting the Queensland family into the spotlight.
In the heartwarming video, Jack tells Matthew: "My mum and dad have told me that you were waiting to find your new kidney. I want to tell you to hang in there buddy.
"I got my new kidney after a whole year and, even though I am little, I remember how hard it was living on the machine and having injections every day until my new kidney came.
"But keep your fight and your chin up, Matthew."
Mrs Scoble urged people to consider signing up to be an organ donor or to make a "live" donation to save someone's life.
"So many people need it," she said. "We couldn't say how grateful we are for the donor who gave Jack a chance to live."Every day you're thinking about it and it's an incredible gift."
'The West Australian' is a trademark of West Australian Newspapers Limited 2013.
All rights reserved.
Select your state to see news for your area.