**Remind children when the rule is about to matter, and repeat it according to how much help they still need.** There is no single useful schedule for every age and rule. Toddlers and preschoolers need frequent reminders; the CDC recommends clear rules, consistent responses from caregivers, and specific praise when children follow them. [CDC guidance](https://www.cdc.gov/parenting-toddlers/structure-rules/rules.html)

A practical approach is:

- **When introducing a rule:** explain it briefly, demonstrate it, and ask your child to show you what to do.
- **Before the relevant situation:** give a short reminder. Before entering a playground, for example: “Check with me before leaving this area.”
- **When they forget:** calmly prompt the action you expect.
- **When they follow it:** acknowledge the behavior: “You checked with me before going over there. Thank you.”
- **As it becomes familiar:** reduce routine prompting, and revisit it when circumstances change.

For your example, I would change **“Do not talk with strangers”** to **“Get my permission before going anywhere with anyone.”** The original rule can discourage a lost child from asking for help, and someone the child knows can also pose a risk. The National Center for Missing & Exploited Children recommends permission-based rules and teaching children whom to approach for help, such as a store employee with a nametag. [NCMEC guidance](https://www.missingkids.org/blog/2023/staying-away-from-stranger-danger)

Practise briefly through friendly role-play: “Someone offers to show you a puppy around the corner. What do you do?” Let your child rehearse saying, “I need to ask my parent,” and coming back to you. Repeat occasionally and before relevant outings; increase practice if they seem unsure. NCMEC specifically recommends role-play to practise these skills.

A child’s ability to recite a rule gives you only part of the picture: applying it in an exciting or confusing situation also takes practice. Reminders and rehearsal support safety, but young children still need adult supervision.

The YouTube video alone cannot establish how often reminders are needed. Its methods and editing would matter, and a staged encounter does not provide a reliable reminder schedule.