A primary school in Derbyshire was evacuated after a pupil brought a World War Two hand grenade to show-and-tell.
The incident occurred at Osmaston CofE Primary School in Ashbourne when a boy unexpectedly produced the grenade from his pocket during an assembly.
Headteacher Jeanette Hart immediately took action when she saw the potential explosive device, which the pupil had brought in after learning about VE Day.
The boy thought the grenade was "interesting" and the entire incident was described as "innocent" by Hart, who noted that the child's family was unaware he had taken the item.
A student brought a World War Two grenade to show and tellFacebook/Matlock, Cromford, Wirksworth and Darley Dale Police SNTHart quickly ended the assembly and carefully removed the grenade from the pupil.
Despite not being "100 per cent happy" carrying the old bomb, she took it outside and placed it behind a large tree in the car park.
"It looked old and I thought it might be safe, but I didn't want to take the risk," she told the BBC.
The headteacher added that she "didn't want to take the risk" of leaving the potential explosive inside the school building.
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Derbyshire Police arrived at the scene along with army explosives experts to assess the potential threat.
A spokesman for the Matlock, Cromford, Wirksworth and Darley Dale Police Safer Neighbourhood Team said: "Just a word of guidance for parents and guardians - double check what your kids are taking to show-and-tell, especially when they are family heirlooms.
"We even got to see [X-ray] images and [were] told a detailed analysis of how there was nothing that would set the grenade off."
The headteacher described the incident as "quite an eventful assembly".
The bomb squad was called to Osmaston CofE Primary School
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She said: "It was going fine and there was a boy who brought an old bullet case in, which I knew about, but then his friend produced a hand grenade from his pocket. That, I was not expecting."
Hart revealed that the boy's family "didn't know [he took it] and they were a little taken aback" when they learned what had happened.
She confirmed the children were moved to safety when police and army explosive experts were called to the scene.
Hart added: "The children didn't really know what was going on, but they knew something was different, and they were excited because they saw the police and because they were playing out when they would have been in school."
