The eight-year-old boy who died in a slurry tank accident at a County Antrim farm was "a gentle natured wee fella", his school principal has said.
Robert Christie was overcome by slurry gases on Saturday afternoon. His father, Bertie, remains critically ill.
Robert was airlifted to hospital in Belfast from the farm near Dunloy, but doctors were unable to resuscitate him.
The principal of Knockahollett Primary School, Gerry Black, paid tribute to Robert.
"He had just such an open personality, such a bubbly wee character, interested in absolutely everything that he did," Mr Black said.
"He was a very, very gentle natured wee fella, made friends quite easily, shared his time with others and for that he was very popular.
"So his loss is going to have a huge impact on his friends, his classmates, the staff and the wider school family."
Robert and his 52-year-old father were helping out on the farm on Ballynaloob Road, near their own farm.
Both were overcome by poisonous fumes as they were mixing slurry. It is understood they were found by a postman on Saturday afternoon.
Northern Ireland's Health and Safety Executive is investigating.
Its chief executive, Keith Morrison, said: "Incidents like this show starkly the dangers which our farming communities face and my heart goes out to those affected by this tragic accident.
"The facts tell us that farming is our most dangerous industry, and that is why members of the Farm Safety Partnership - government and the farming industry together - will continue to work every day to try to avoid these tragic events occurring."
A police spokesman said: "At the request of family members, police will not be releasing any further details at this time."
Barclay Bell, the deputy president of the Ulster Farmers Union, said dangerous gases build up in the slurry tanks.
"It's really a tank for holding all the waste products from animals produced during the winter time," he said.
"It stays in these tanks maybe for a number of months and a lethal combination of gases build up, including methane, carbon dioxide, ammonia, and worst of all, probably, hydrogen sulphide."
DUP MP Ian Paisley Jr said: "It is deeply distressing to learn of yet another death near a slurry pit."
He added: "These accidents are tragic as they remind us of the real dangers the farming community face every day."
Sinn Féin assembly member Daithi McKay said: "Local people here are shocked at what has happened earlier today, as are the farming community across north Antrim."
TUV assembly member Jim Allister said: "The dangers of farming are ever present and when they claim lives, then it comes home to us all just how vulnerable farming families can be."
Ulster Unionist assembly member Robin Swann said: "It is becoming clear this is another terrible slurry tank accident. The fact remains that slurry is an ever-present danger on most farms."
SDLP councillor Harry Boyle said: "The Dunloy and Loughgiel community will rally around the Christie family to offer our heartfelt support, just as they have always been a source of support for us in difficult times."
It is the latest in a long line of fatal accidents involving slurry tanks on Northern Ireland's farms.
The most high profile incident was in September 2012, when Ulster rugby player Nevin Spence, his father Noel and brother Graham died after they were overcome by fumes on their family farm.