Following is an excerpt from the Family Watchdog which might be a good starting point.
https://www.thehomesecurityadvisor.com/family-watchdog-sex-offender-search-tool/
Avoid scary details. Keep information general. Explain the importance of avoiding dangerous situations, rather than trying to teach them to be safe from just the one person you know about.
• DONT accept a ride from a stranger.
• DONT go into the home or yard of a stranger.
• TELL your parents if a stranger offers you toys, money, gifts, or candy.
• TRY to use the buddy system when children play outdoors.
• CALL 911 if your parents are not around and a stranger approaches you
