How to block Wi-Fi from an ipod?

My brother is watching too much minecraft videos and my mother asked me if I could help shut the Wi-Fi off his ipod, my brother knows the Wi-Fi password, and my mom wouldn't bother changing the password… Is there any way to shut off the Wi-Fi on the ipod?

You can block him at the router by blacklisting his mac address. Goodbye internet even if he knowa the Wi-Fi password.

Change the router password.

You can block him at the router. You have to have the router password, and then you have to find his ip address or his mac address, and then you have to block whichever your router allows. MAC address would be better.

NO, he can access it as long as he has the password.

I'm not sure if this will work but there should be a privacy setting and maybe a shut Wi-Fi off?