The children, including two primary school pupils, faced a range of charges including weapons, criminal damage and theft charges.
The youngest child, who magistrate Ann McGarvie described as the worst offender, faced two weapons charges involving knives, as well as theft charges.
The children were in court for up to seven separate offences between September and December last year.
Ms McGarvie put the children, who were facing court for the first time, on 12-month good-behaviour bonds and urged them to change their ways and improve their future.
She told the eldest child he’s “meant to set a good example” for his younger peers.
“You have never come before a court before; you’ve got a good past so don’t make it a bad future,” Ms McGarvie said.
The magistrate also told the youngest child she was concerned about his association with knives and his future.
“You’re the youngest of your mates, but your behaviour has been the worst and the most dangerous,” Ms McGarvie said.
“You don’t always know the size and the strength of someone and having a knife, if someone is able to overpower you and take the knife from you, it could seriously harm or kill you,” she said.
“And there’s the concern that you will seriously harm or kill someone.
“You don’t always know what will happen with a knife.”
Police Prosecutor Senior Leading Constable Scott Bell said he was concerned with the impact the children’s knife use could have on the community.
“The police’s main concern is not if but when the boys pick a fight with someone who is their measure what will happen,” Mr Bell said.
“It’s not just for their safety, it’s for other children’s safety, it’s for the police who have to attend the incident and it’s for the community,” he said.
“The trouble is trying to make them understand the consequences of their action.”