Emergency services enthusiasts Chelsea-Mae and Mason were invited to meet Local Policing Inspector Bryn Glennie and some of his team at Barry Police Station, after they surprised officers with some sweet treats as part of a new national Facebook craze.

Mason, 13, and Chelsea-Mae, eight, left bags of sweets with a note telling officers: "You've been Hit by the Police Gamers".

The two got the idea after joining the Ambulance gamers Facebook page, which encourages people to leave small gestures of thanks for emergency service workers.

After tracking down the generous duo, Inspector Glennie invited them in to the station for a short visit to the station where he answered some of their questions about policing, introduced them to some of the team and treated them to a short ride in a police car.

Inspector Glennie said: "Chelsea and Mason are fantastic children, and I thoroughly enjoyed their visit to us.

"They spent the whole time smiling and it was a pleasure to answer some of their questions and see first-hand their enthusiasm and gratitude for the emergency services.

"The team and I were genuinely touched by their kindness and selflessness in leaving some sweets for us – we all know sweets are worth more than gold to most children! – and we were intrigued to find out more about the Hit the Ambulance Gamers craze. We feel very honoured to have been a part of it."

The pair's mum, Sam Fry, said: "We saw a Facebook group called Hit the Ambulance Gamers and thought it was a fantastic idea. Mason has Down Syndrome and a heart condition, for which he's had to undergo three open heart operations.

"As a result, we've required the help of the ambulance service on a lot of occasions, and we think the police and fire service are equally fantastic at what they do to help the community, keeping us and our streets safe.

"It was a small act of kindness just to show them that they are appreciated.

"Mason and Chelsea-Mae both had a fantastic day. The police officer was amazing with them; they've told everyone about their day and couldn't wait to show their school friends the pictures.

"I can't thank South Wales Police enough for what they've done, we are all very grateful."