Yerbius123 – your solution of root is pointless as once you have flashed a recovery it is all bootable of external links.
OP: Yeshurun: is the tablet usb otg or usb host supporting? issue being you can plug a further usb wifi adaptor or even a 3g modem in…
best thing is to install a program like covenant eyes or web chaver or k9…. that way child has filtered monitered acvcess and is not tempted to bypass… (app lock too to prevent installation of others etc..)