Luca Giovannini from Manchester passed away just 24 hours after being admitted to hospital feeling sick. Doctors are still unable to confirm his cause of death, but suspect it could have been a rare reaction to the usually-treatable Epstein-Barr virus.
Despite their grief, his parents Vickie and Renzo decided to donate some of Luca's organs for transplant.
One of the recipients was a two-year-old girl who was close to death but is now expected to be home with her parents in time for Christmas.
A two year old boy and a 35-year-old mum of two also received Luca's organs.
His dad Renzo, 38, told the Daily Mail:
"When the medics were trying to save Luca's life I asked a doctor what his chances were of surviving and he said we were looking at the worst-case scenario. It's a scenario which no parent wants to be faced with, but it was at that stage that we discussed organ donation.
"One week we were thinking about buying Luca his Christmas present and the next we were looking for a grave for him."
He said that he and his wife sent Luca's organs "with love to all these people":
"Luca did a lot of things in his short life whereas these two children have never been out of hospital and now hopefully they will get the chance to live similar lives."
Renzo said Luca was a "lively lad" with a "sunny disposition" and a "very happy little boy."
Such a sad story, but what a wonderful decision by Luca's parents.