Father's Day this year will be extra special for dad Ivan Kinahan, as it will mark just over one year since he donated a kidney to son Sam (6).
Sam had been on dialysis since he was four months old and life for the Baldoyle family has changed dramatically since the transplant.
Ivan said he has never regretted it and would encourage people to consider organ donation.
"Sam used to attend hospital three times a week for three hours every single week, whether it was Christmas time, birthdays, you name it," Sam's mum Chloe said.
"Since getting the kidney, these visits have slowed down considerably, and we are now at a point where we only attend for review once every six weeks."
Before the transplant, Sam, who has a sister, Ali (9), could not have a bath or go swimming due to his dialysis line.
"He started swimming lessons in February and loved the water but unfortunately Covid curtailed that for a short time," said Chloe.
Father's Day last year was on June 16.
"Ivan was just home from hospital and really feeling the effects of a major surgery and still quite unwell," she said.
"This year, we will be able to savour the day and the amazing gift that Ivan has given to Sam."
Ivan said: "I felt both lucky to have been such a close match and also privileged to be able to help him.
"I've never regretted it for a second and would urge anyone considering organ donation to embrace the gift we all have within us."
Sam was diagnosed with a rare kidney condition called Posterior Urethral Valve when Chloe was pregnant with him.
She said many people do not realise a transplant is not a cure but another form of treatment.
"We know Sam may need another kidney or more as he grows and we want to urge as many people as possible to have that difficult conversation with their families about what their wishes would be regarding organ donation," she said.
They have praised the support from the Irish Kidney Association (IKA) and will be taking part in the Virtual Run For A Life for the association this month.
"We will complete it on the last day, on Father's Day, in a tribute to Ivan but to all donors, both living and deceased, who selflessly save lives every day," she said.
"The IKA is an incredible charity, we have made many friends and had amazing support...they really empower patients and their families to deal with a very serious illness."
Organ donor awareness ambassador Ray D'Arcy ran in last year's IKA Run For A Life event along with almost 500 others at Corkagh Park in Dublin.
The event will run over three weeks and people can enter as many times as they like by registering each time at ika.ie.
Organ donor cards can be obtained by phoning the Irish Kidney Association on 01 6205306 or free text the word DONOR to 50050.
You can also visit ika.ie/get-a-donor-card or download a 'digital organ donor card' app.