"It can rob them of their childhood, they can become scared, frightened and confused, and it can have long-lasting psychological and emotional consequences for the children."
Mandac had abused the trust of the children, who were vulnerable because of his position as an adult, compared to their position as children.
In mitigation, the judge said Mandac had no previous convictions, had entered a belated guilty plea and had offered to pay reparation of $5000 to the victim's family for the emotional harm caused by his offending.
However, as a result of his earlier not guilty plea, two of the alleged victims on the earlier charges had to "relive" the alleged offending by watching their interviews and giving evidence in court. It was also put to them during the trial that they were wrong or were not telling the truth.
"My impression is that they are both brave young children who are clearly telling the truth. That's been reinforced by your guilty plea," Judge O'Driscoll said.
The judge said the starting point for sentence was 18 months in prison, however he reduced the final sentence to 12 months because of the mitigating factors. Mandac was also ordered to pay $5000 in reparation.