THEY have one thing in common – and that's a fighting spirit.
The charity was set up by Jimmy and Anne Marie Norman, who lost their daughter Aoibheann (8) to cancer two years ago.
The Olympic champion met some of the children and their families receiving treatment from Our Lady's Hospital for Sick Children in Crumlin at a special Pink Tie event in Dunboyne, Co Meath.
"This is a brilliant cause. They are helping the families, as well as the kids with cancer," she said.
"I think sometimes the families can be forgotten about. When the children have cancer their families are affected as well."
The delighted gold medal boxer said it was "a pleasure" for her to be here "in the middle of all these amazing kids".
She was presented with a special supersize pink tie by Amy Spratt (7), from Ashbourne, Co Meath – who has just completed chemotherapy.
"To speak to another parent who has been through what we are going through means so much. You know you are not on your own," said Amy's mum Carol.
And there was more Christmas magic in the air when another group of children from Our Lady's Hospital took to the skies on board the Santa Express.
With their special boarding passes clearly marked 'The North Pole' – 30 children aged between three and 10, along with parents, Clown Doctors and hospital staff paid a very important trip to the man in red.
They met up with Santa as he prepared his sleigh and gifts to deliver to Ireland this Christmas.
This VIP group received a special garda escort from the hospital to Dublin Airport and the children were accompanied by Santa's elves on the flight.
A festively festooned double decker bus was waiting to whisk them off to the Southend seafront where they had some frosty ice-cream.
They then took the train up the world's longest pleasure pier to visit the new cultural centre where Santa awaited.
This is the 12th year that airline staff have organised a festive day out for a group of young patients along with their parents, siblings and carers.