If someone tells the child to come with them, they should check with the grownup in charge, and if necessary insist the police be called. Anybody who means well will understand because they will want the child to be safe. If someone gives the child a hard time about checking things out, it’s a sign that it’s a problem. If a stranger calls you, don’t go to them, don’t go to their car, don’t try to help, get the grownup in charge, who will be able to help better anyway.
If an adult is trying to take them somewhere without letting the child get direct permission from the grownup in charge of them, that person means to hurt them. They should scream “You’re not my mom/dad!” and “Call the police!” (“No”, “Stop”, etc. may be dismissed as a child having a tantrum with their parent.) It is also okay to fight back. Hitting, kicking, biting, etc. - the things they’re taught never to do are okay to get away from an adult.
It is not okay to keep secrets from parents. If anybody asks them to keep a secret from their parent, they should tell their parent at once. Surprises are okay if: the person is trusted, the surprise is a good thing and won’t break any rules, and the parent will be told soon - ex. making a Mother’s Day card.
Stop, Drop, and Roll for fire. What to do if the fire alarm goes off
How to get themselves out of a car if necessary
Backup person if parents can’t be reached (neighbor, grandparent, friend’s mom, etc.)
Privates are private. Nobody should be touching their privates or asking them to touch privates. If anyone does, the child is not in trouble, but the parents need to know at once.
If they see a gun, even if they think it’s unloaded or just a toy, they should leave it alone and go tell the grownup in charge.
I like these books:
https://www.amazon.com/Berenstain-Bears-Learn-About-Strangers/dp/0394873343
https://www.amazon.com/Stop-Drop-Roll-about-Safety/dp/0689843550/ref=sr_1_2?crid=U9RXUQ9M9ZZO&keywords=stop+drop+roll&qid=1674006024&s=books&sprefix=stop+drop+roll%2Cstripbooks%2C79&sr=1-2
A tip for the parent:
If you are going to be at a crowded place where getting separated might be a problem (amusement park, festival, airport, etc.), take a snapshot of them with your phone. You probably won’t need it and it’s easy to erase, but if the unthinkable happens and you have to start a search, you’ll have a current picture and know exactly what they were wearing.