To create physical bitcoin doesn't look a good idea, because it's not supposed to work like this. Bitcoin demands internet access, so people can deal in real time person to person, without involving any central middlemen and barter systems.
A holder of bitcoin cash is not restricted from cashing in if he wants. No one is stopping him. Bitcoin cash simply allows the use of bitcoin offline. It is even environmentally friendly because offline transactions do not require electricity - which has been a big concern lately.
But the holder will need to trust a kind of authority who will say what is the legal bitcoin cash and what isn't. This central authority is going to replace blockchain function, which inevitably demands internet connection to work guaranting legitimacy to every transactions in a decentralized concept.
To have a central regulator issuing bitcoin cash officially raises a lot of doubts about the legitimacy of the process. For transparency and autonomy purposes it's better to simply work to connect people to internet faster as possible. Contact the government's agents, contact crypto businesses which will be benefited by the spread of internet access, contact philanthropist organizations which give assistance to third world countries.