A two-year-old boy fell to his death from a faulty window just seconds after his mum left him playing in an upstairs bedroom, an inquest heard.
T-Jay Dedman had been playing with a girl of the same age when he fell from the first floor.
The boy was found on the pavement outside by a passer-by and died in hospital six days later.
His mum Chelsey Wall, who described her boy as always happy, said tragedy struck literally seconds after she went downstairs.
A woman saw T-Jay crying an knocked on the door of the house in the Tuebrook area of Liverpool before emergency services were called.
He was rushed to Alder Hey Childrens Hospital with a fracture to his skull, with his condition described as serious but stable.
But despite treatment to alleviate pressure on the youngsters swollen brain, he began to suffer from multiple and repeated seizures.
He died on November 23, surrounded by his loved ones.
The inquest held at the Gerard Majella Courthouse heard how Miss Wall was visiting a friend and her three children when the incident happened.
During the visit Miss Wall was left in charge of the four children, while her friend went to the shops.
T-Jay was reportedly playing with another two-year-old little girl in a small box room, while a nine-year-old child was playing on his Playstation in his bedroom.
The court heard Miss Wall, was trying to get the children out of the bedroom and on to the landing when she was called downstairs by her friends seven-year-old daughter to help with a gingerbread house she was building.
The court heard how the rented house had a faulty window in the room where the youngsters were playing, which Miss Wall did not know about.
Following the incident Merseyside Police carried out an investigation and it was found the window had a broken restrictor or safety catch, which would have stopped it from fully opening if working.
However the window, which was reportedly closed, did have a lock, which had to be pressed in and then the handle lifted to open.
Senior Coroner Andre Rebello said it was hard to know what position the window was in before T-Jay fell.
But the window was reported as faulty to the landlord two weeks previously.