Variety, the children's charity, started KKS in a bid to help parents pay for back-to-school costs, such as uniforms, stationery and extra-curricular activities.
And it was in the sporting arena the grandchildren excelled but it would not have been possible without the help of Variety, Lynette explained.
"The sponsors are making those children be normal children," she said.
"They then don't have that thing where they can't afford it, that stigma attached to them. There's nothing worse than having to say, 'oh, my parents can't afford it'.
"We're not well off, we don't act like it and we do not pretend to be, but with the sponsorship, the kids get that little bit extra."
Around the same time the KKS started, the 61-year-old received a double lung transplant which hospitalised her for some time.
"Financially, when I was sick, we went broke," she said.
"I was in hospital for three months but I don't know what would have happened to the boys if I didn't have the transplant."
A former smoker, Lynette now sometimes speaks to school kids about why they should not smoke cigarettes.
Post-operation she felt as though she had to give back to her community - one that doesn't fully understand what the family was going through.
"We've had a lot of support from friends and we've lost a lot of friends from having the kids because socially we're not able to go anywhere," Lynette said.
"We're very distant from them and so that's really hard. But we've made new friends and they know where we stand and what's going on.
"Some of them don't have grandkids and they're our age, they just don't understand … they think we're crazy, sometimes we are crazy, but they're our grandkids."
Allan said he was nearing 65 years old and while he could have been retired by now, he and his wife of 40 years are still needing to work.
Self-employed, the Rowans run a commercial cleaning business but cannot operate full-time due to Lynette's health and because they have to care for the boys.
They had been caring for their grandchildren for the past 12 years after the then Child, Youth and Family knocked on their door.