Family, friends, neighbours, classmates and residents of the town who did not even know the Aktins children were grieving the loss of 11-year-old boy Blake and five-year-old twin girls Matylda and Scarlett.

The Hunter Valley town's residents, along with people from the region and across the country, had flooded a GoFundMe fundraising campaign with donations to support the family in the 24 hours since the fire.

More than $175,000 had been raised by Thursday evening for 31-year-old mother Kara and her eight-year-old daughter Bayley - who both survived the Wenesday morning blaze - and Ms Atkins' partner, Chris.

People stopped by the family's fire-ravaged Brittliffe Close home throughout the day to pay their respects alongside a floral tribute set up under a tree in the property's front yard.

Relatives of the family had visited the property early in the morning, but there was little for them left to pick up inside the charred and now fenced-off house.

READ MORE: As it happened: the Singleton house fire

Stuart Sonter, 32, and his partner, Emily Murphy, 26, arrived at the house about midday to lay flowers with their two children, Tyler, 5, and Georgia, 4.

Mr Sonter said the incident had evoked memories of losing his grandmother in a family house fire only a street away in 1997.

The couple said they were aware of the tragedy on Wednesday morning, but it wasn't until the evening news that they knew who was involved.

Tyler had spotted the twins in news reports and commented that they were his classmates at school.

"It wasn't until photos come up on the news that my son actually said, 'I go to school with them'," Mr Sonter said. "That's when I had to sort of sit him down and have a talk to him about it."

Tyler and Georgia each laid a bunch of flowers outside the home, which Mr Sonter and Ms Murphy thought was an action that may assist their son in understanding the deaths.

"We just thought we'd come down and show our support by putting some flowers down," he said.

"Something special for him, something to settle him a little. We've donated to the GoFundMe page as well."

Multiple counsellors spent the day talking to students at King Street Public School, where the Atkins children were students.

The school's principal had addressed all students at an assembly, and each individual class of the three children, on Wednesday.

READ MORE: Heartbreak and heroes in horrific house fire

Some classmates filtered into Brittliffe Close on Thursday afternoon to contribute to the memorial.

Sienna Doughty, a classmate of Blake, her sister Ella and nan Julie Parker added flowers to what was a burgeoning tribute.

Blake, who neighbours and family friends said loved his footy, played for the Singleton Junior Rugby League Football Club, which expressed their condolences to the family in a social media post on Wednesday.

Under 12's coach Paul Larcombe told the Newcastle Herald 11-year-old Blake was in his first year with the club. Mr Larcombe said he would be sorely missed among the team and broader club.

"He was a typical 11-year-old kid, he was full of life and a pleasure to have at training," he said.

"He was a good young kid. A smiley faced young kid who will definitely be missed."

Mr Larcoombe said the the side was due to train on Thursday night.

He said the players and parents would come together and decide whether to play their matches this weekend.

He said it was likely the club would hold some sort of tribute, but noted how well the existing fundraising campaign had taken off.

"The money they've raised is extraordinary really, and pretty generous of the local community and people right through the Hunter," he said.

Beau Forbes, whose mum lives two doors up on Brittliffe Close and provided assistance on the morning of the fire, said Blake had looked up to him over the years, much like he had done as a child with Ms Atkins' partner Chris.

"I've known Kara since I was really little," Mr Forbes said.

"When I was living at my mums I used to come up here and see her.

"I've known Chris for a very, very long time and he's always been there for me, and it's time for me to give back what he's given me."

Fighting back tears, Mr Forbes said his mum was "not coping very well" and "it was a real tragedy" the three children could not be saved.

"Mum and Kara are very close," he said.

Mr Forbes, 23, and his four-year-old daughter Kiera-Lea Gover, who used to play with the twins, bought solar powered light bulbs and tied them to the tree branches above the memorial on Thursday afternoon.

He said the bulbs would provide a light for Blake and the twins - who where meant to be celebrating a birthday next week.

"It's so they're never lost and never afraid," Mr Forbes said of the light bulbs.

"I seen on Facebook that everyone was saying they were going to leave their front light on to light up the path for the three angels. So I came up with the idea of [solar-powered] light bulbs that will always be on to show that they're not alone."

Singleton Newsagency owner Allison Lawson said there was "a lot of sorrow" among the town's residents.

"Disbelief and empathising with [mum Kara] and the family in general," she said.

"A lot of people coming in and saying, 'this is terrible'."

Ms Lawson said some elderly residents without access to the internet had inquired about how they could contribute to the fundraising campaign.

She said it was no surprise the community had come together to support the family.

"One thing with tragedies, I think it brings the best out in people," she said.

Investigations were continuing into the cause of the fire on Thursday, with the focus on a wood combustion heater that was removed from the property on Wednesday for analysis.

Ms Atkins remained at John Hunter Hospital in a stable condition on Thursday evening. An update on her daughter Bayley's condition could not be provided for privacy reasons.