You can create Geofence around the place they specified that they will go and you will be notified when they leave or enter the location.
To setup a Geofence, follow these steps
Tap on the child and go to the 'Rules'
Go to the 'Monitoring & Apps' tab on the top right
Tap on 'Location & Geofences' and make sure it is turned on
Tap on 'Setup now'
Choose the category that best describes the place you want to geofence. For instance:
Tap on 'Home' if you want to mark your residence.
Choose 'School' for setting up a geofence around a school area.
Select 'Playground' to geofence a recreational area.
If the place does not fit any of the categories, select 'Other'.
Adding a place
Adjust the Pin as needed by dragging the map or tapping the map, or
Use the search bar if you need to find a specific address or landmark. Begin typing the address or name of the location, and select the correct one from the suggestions that appear.
After adding the place, set the boundary by adjusting the slider. The minimum boundary is 100m, we can't go less than that.
When you are satisfied with the location, tap the 'Next' button to proceed to the next step in the process.
If you have chosen 'Other', type in the name you wish to assign to this location. Below the place name, you'll see the 'Location Type' with two options: 'Safe' and 'Unsafe'.
Choose 'Safe' if this is a location you consider secure, or
Choose 'Unsafe' if you want to be alerted when entering an area you consider to be potentially dangerous.
On the next page, you can review the Geofence you have set up and if you are happy with the settings tap on 'Save'
If the child’s devices are offline you will receive the alert only when the devices come back online. Be aware that alerts will only be sent when the child crosses the defined boundary
Related questions
How to find out if my child has reached his school?
For this, you can create a Geofence around your school and you will be notified when your child leaves or reaches that location. It is advised to create Geofences around all the common locations your child visits regularly.