Andrew Partington, 27, admitted killing a two-year-old boy after causing a massive explosion in Shaw, Oldham, in June.
The explosion "obliterated" Partington's rented terrace house and two neighbouring homes, with the rest of the row and surrounding streets also left devastated.
Jamie Heaton, 2, had been watching children's TV in the lounge next door and was killed in the blast.
Partington, who was seriously injured in the incident, appeared at Manchester Crown Court by videolink from jail today.
He pleaded guilty to manslaughter and eight charges of destroying neighbouring houses in the blast on Buckley Street, Shaw, Oldham.
Andrew Partington, 27, today admitted at Manchester Crown Court the manslaughter of Jamie Heaton, aged two, who was killed in a gas blast at his home in Shaw, Oldham, in June.
A man from Oldham had admitted giving out bags of cocaine to children who were trick-or-treating. 23-year-old Donald Junior Green said he gave out the bags by mistake on Halloween and tried to track down the children afterwards.
He was found out by the father of one of the children. Get more on this story from ITV Granada.
Three men and a woman have been arrested after a man was found with serious stab wounds at a house in Oldham in the early hours of Monday.
The 48-year-old victim later died in hospital. The men - aged 57, 39 and 32 - and a 29-year-old woman have been arrested on suspicion of murder.
Greater Manchester Police are investigating the incident.
Oldham Council says a number of properties in the immediate area of the explosion will have to be demolished.
Ten properties were seriously affected. The council says others will have to be assessed for structural damage.
Jamie Heaton's parents, Michelle and Kenny have released a statement about their 'happy little boy, mischievous and full of laughter'.Read the full story ›
The parents of a two-year-old killed in an explosion in Shaw, Greater Manchester, visited the scene earlier and looked at messages and flowers left by well-wishers in memory of their son.
Detective Chief Inspector Pete Marsh, from Greater Manchester Police, reads a statement on behalf of Michelle and Kenny Heaton, Jamie's parents.
Before the statement was read the couple looked at messages and flowers left by well-wishers in memory of their son, who died in a suspected gas explosion.
The parents of two-year-old Jamie Heaton, who died in an explosion in Shaw, Greater Manchester, paid tribute to their son, saying: "Jamie was unique and amazing. We will miss everything about him."
A man arrested on suspicion of manslaughter over a gas blast which killed a two-year-old boy has been released on bail.
The 32-year-old from the Shaw area of Oldham was held in London yesterday and was taken to Manchester today for questioning in connection with Tuesday's massive explosion.
Police said they understood the suspect may have done some boiler maintenance work at one of the houses in Buckley Street, Oldham.