Hi, does your setting have a 'stop' message that children use to safeguard themselves from frustrating, uncomfortable or frightening situations?
This blog post on Teacher Tom provides an insightful perspective -
"stop".
Another safeguarding strategy that supports child protection is disclosure, how do children tell you when they're upset, scared, concerned or want to share positive information/observations about their day?
You could use the key-person/worker strategy to base this on or have a more open whole group approach and a 'tell an adult, tell a friend let's get it sorted out.' or for activities 'What you like, what you don't like, let's plan what we do together' system.
The list of books here aims to support children's self esteem and confidence through discussion & story telling -
safeguarding and awareness
Hth xx