The schoolboy's endangered staff, including a teen assistant in the store in Goodna, Queensland, until more than $ 1,000 were surrendered.
When watching CCTV recordings of the incident, Ipswich judge Alexander Horneman-Wren SC with the Court Court prosecutor accused the three young people entering the Goodna IGA supermarket "in a flash".
"Those (employees) were, of course, afraid of your actions. As judges it is not usual for us to see the faces of the people you terrorized," he told the three quiet sons who were in the quay.
16-16 and 16 years, the offenders continue in the same gymnasium. Crown prosecutor Clayton Wallis described them as "all youthful first time offenders", their actions a apparent deviation.
All three claimed to commit armed robbery in the company when they were armed with dangerous instruments in the IGA store on August 25, 2017.
Mr. Wallis said that they had disguises and were armed. When they entered the supermarket in a flash, they peeled off.
The man ran the counter with a steel pole, while two went down the hall to deli and "corralled" another staff that led them to the counter.
A customer who shortly followed them when they left threw a food tin.
Mr. Wallis said that the channel might have hit one as he was thought to stop.
The boys were found shortly by the police and had a machete and knives.
Two of the shameful teenagers held their heads down the quay and did not watch the video of their armed robbery.
Mr. Wallis described what the 16-year-old girl who worked behind the counter told the police that night and said she had stopped crying.
Shaking so badly that she could not stand and fall to the floor.
Judge Horneman-Wren said he could see terror on employee faces, victims.
"This was something that will remain with them for some time," said Mr Wallis.  "The level of planning illuminates their young years. It was conscious behavior. They spoiled themselves. It was (related) to divide and conquer a level of sophistication."
"They are lucky to be under the Youth Day Act, so detention prison) is a last resort. Their rehabilitation is at the forefront of conviction in view of their youth. "
The Crown sought surveys for up to three years that would help keep them out of trouble.
One of the three had made an early plea that showed some latent insight and also wrote an apology letter.
] A offender was born in New Zealand.
Judge Horneman-Wren said that they acted as a gang and chose a soft goal, the victims of their attack were ordinary people trying to earn an honest living.
"They became confronted with a pack of young hoodlums brandishing weapons, "he said.
For their role, two of the schoolboys were sentenced to two years' probation.
Judge Horneman-Wren said," I hope this experience will make you to really grow up. "
This article was originally published in Sunshine Coast Daily and is reissued with permission.