Cuddly toys are to be taken in police vehicles called to collisions and firearms incidents in Cambridgeshire to help relax any children involved.
Police said they hope the toys will provide some comfort while emergency services deal with an incident.
The scheme was set up by Jackie Gadd with funding from the St Neots Police Charity Ball.
She said a crash on the M25 several years ago was "extremely distressing" for her children.
"I'm convinced that if they had been given a teddy to cuddle while the incident was dealt with it would have reduced their stress significantly," she added.
Ch Insp Mike Winters said: "Being involved in or witness to a serious collision or firearms incident is an extremely distressing experience.
"Toys will allow officers to offer children involved some comfort to help reduce the stress of this experience.
"Several forces are already using the toys and have found they help to calm down children."
New toys were donated to the force or offered to the charity ball's committee at a reduced price.