Elopement

 Have a plan

Have the places written down (where they'd go)

Contact people to help you look (law enforcement,  neighbors, family, friends)

Think about why they'd elope (to get out of a stressful situation, getting out of doing something, etc)

Watch the child to see their behaviors that led to the elopement

Keep information up to date

Carry information 

Secure all homes, vehicles, fencing, doors, etc

Have a safe location 

Be alert 

Try to teach them safety (swimming, crossing streets, stranger danger, etc)