Block Internet:

Step 1: Parental Control

Select "Parental Control" from the left menu.

Step 2: Supervisions

Select "Supervisions" from the bottom navigation bar.

Step 3: Time Supervision

Select Time Supervision and long press on a particular device.

Step 4: Block the Internet

Select the option "Block Internet".

Internet is blocked for this device.

Unblock the Internet:

Step 1: Unblock the Internet

Long press on the device and select "Unblock Internet" to unblock.

The Internet is unblocked successfully.