@GTownFan 

What you mentioned what your 10-year-old does is why the MAC address keeps getting changed. 

On Android and Apple devices there is a setting to disable the ability to do that:

Google Pixel / Motorola / Other Androids:
Open the Settings app
Select Network and Internet
Select WiFi
Connect to the Wireless network
Tap the gear icon next to the current connection
Select Advanced
Select Privacy
Select "Use device MAC"

Samsung Galaxy:
Navigate to "Settings"
Select "Connections"
Select "WiFi"
Select "the Wireless Network you wish to connect to"
Tap the gear-shaped icon next to the network you connected to
Select "Advanced"
On the next screen, there is a menu labeled "MAC Address Type".
Tap on "MAC Address Type"
Select “Use Phone/Device MAC”

Apple iOS 14 & Later:
Ensure your device is connected to a Wi-Fi Network
Open the "Settings app", then tap "Wi-Fi"
Tap the "information button" next to your Plume network 
Tap on the "Use private Address" toggle to turn it off
After, a privacy warning will pop-up

In your case, if it is a computer you may need to use the wireless schedule that will disable the Wi-Fi (Advanced > Wireless > Wireless Schedule).