It's Kids Take Over at Waterloo Regional Police headquarters on Friday.
Cherri Greeno, a spokesperson for regional police said that the service reached out to children it knew to invite them to participate.
"For instance, there's a couple kids we know want to be police officers and they're always messaging us and they're really excited every time they get to take part in a campaign that we have going on. We knew they were celebrating their tenth birthday so we surprised them with a phone call to come take part," she said.
"We have another child here who not too long ago, he was in a situation where a family member needed help and he was only seven years old, but he knew to call 9-1-1, and he called 9-1-1 and was able to help that family member."
Kids get a behind-the-scenes look at police work, including touring police offices, vehicles, and different units.
They also get to dress up in uniforms, with their own police hats.
Greeno said, "There's lots of laughs, lots of questions being asked. They want to know certain things about how we catch speeders. They want to meet our deputy chief and our chief."
Kids Take Over initiatives are being put on locally by the region's Children and Youth Planning Table.
This is the second year regional police have hosted a takeover event.
You can find out more about Kids Take Over here.