Two-year-old Zayne Colson's mother has clutched an urn with her son's ashes as the Adelaide man who killed him in a road crash was jailed.
Now the boy's family hopes the hit-and-run driver "can rot in hell".
Convicted pedophile Michael Craig Bullock, who ran down the toddler, was sentenced on Friday in the District Court to at least three years and eight months behind bars.
Zayne's mother, Chantelle Young, had brought his ashes to the hearing with the boy's aunt telling reporters outside the court how important they were to the family.
"This is how we cuddle Zayne. This is how we kiss him," Cindy Agius said through tears.
Bullock had been found guilty by a District Court jury of aggravated driving without due care causing death and with leaving the scene of the accident at suburban Dover Gardens in February 2017.
He had run the boy down, the impact dragging his body under the car for a few metres.
Bullock had driven on, returning to his home nearby where his wife called emergency services.
The 54-year-old testified he was travelling about 35 km/h on the residential street when he swerved to miss one of Zayne's sisters and felt something under his wheels but "just thought it was a ball".
Outside court, the boy's great aunt, Tania Kearney, rejected his explanation.
"How can you think a two-year-old is a ball bouncing around under your car?" she said.
"So Bullock can rot in hell and I hope karma is swift and I hope karma is f***ing cruel."
In sentencing, Judge Paul Cuthbertson said the offending was particularly serious considering the victim's age and the fact Bullock had not stopped, even though there was probably nothing he could have done to save the boy.
He said Bullock had been travelling at excessive speed before the accident.
"The contact with the child was heavy and the child went under the car," he said.
"So it must have been apparent that Zayne would have been grievously hurt."
The judge said Bullock had suffered as a child, being abused while living in a boys' home, but also had a long history of offending including sex crimes against children.
"Here, before you, there is just one more group of people who have suffered grievously as a consequence of you being on this earth," he said.
"You are to be pitied, but I can do no more than impose significant penalties to attempt to deter others from similar offending and to deter you from repeating such offending."
Judge Cuthbertson jailed Bullock for four years and seven months with a non-parole period of three years and eight months.