Knives, darts, scissors and screwdrivers were among the 43 weapons taken from pupils in north-east schools since last year.
Figures released under a Freedom of Information request show the weapons were seized in schools across Aberdeen, Aberdeenshire and Moray.
Of the 43 seizures made, two bladed weapons, three darts and 31 knives were taken.
Three pairs of scissors, a multi-tool blade, a screwdriver and two Stanley blades have also been confiscated since April 1 2017.
A total of 38 offences were recorded.
A further five youngsters have been caught with a bladed weapon since April. One five-year-old is among those accused of carrying weapons, along with a further 25 youngsters aged 12 and under.
Partnerships Inspector Sheila McDerment said: “A crucial part of this process includes delivering a consistent message about the potential dangers and consequences of carrying weapons.
“In many of these cases the young person involved has not realised the serious and life-changing consequences that could result from simply picking up a weapon.
“It is crucial everyone understands that, even if you never intend to hurt someone, the act of carrying or picking one up could result in unthinkable consequences, not to mention a potential criminal record.”
An Aberdeen City Council spokeswoman said: “We have worked with our partners in Police Scotland and the Ben Kinsella Trust in delivering appropriate training to secondary and Primary 7 pupils, written to parents of schoolchildren across the city spelling out our expectations regarding safety and have in place a process of notifying Police Scotland of each instance of knife possession in schools.
“We also conduct, with pupil consent, searches for weapons at our schools.”
Vincent Docherty, Aberdeenshire Council’s head of education, added: “I would like to reassure parents and residents in Aberdeenshire that instances of pupils possessing knives in schools are rare.”
And Moray Council’s chair of children and young people’s services committee, Sonya Warren, said it is “confident” its schools have the correct procedures in place to deal with incidents involving offensive weapons.