The police were called to Airy Hill Community Primary School in Whitby after an unknown visitor entered the year three classroom and created a scene of destruction.
Year three youngsters arrived at school the morning after the incident to find a chaotic classroom.
They were informed by the police and teaching staff to report straight to the school hall.
Ryan Leadley said: “I’m not sure what is going on, but it looks very strange.”
Throughout the day, the children had to sort through and search for evidence using evidence logs, iPads and sketches. They found a variety of items including flint and wood tools and weapons and animal fur and skins.
Leah Johnson also found a very important and revealing letter.
Since September, the children have been studying the Stone Age and studying the book The Stone Age Boy.
The letter revealed along with the evidence collected that the visitor was in fact Om, the girl from within their story. Om had been in search of her friend, The Stone Age Boy and had been recognised the cave and cave paintings in the year three classroom so thought he must have been inside.
The children are going to feed back their findings to the police and continue to collect any other evidence.
They hope that Om will one day return to the school and keep in contact with them, to help them learn more about the Stone Age.