Ask him if he can do a tutorial on how to do Silent Payments on cold wallets. I think Bitbox and Seedsigner have the capability.
Seedsigner was more difficult than expected, he should definitely make a tutorial on this one. https://njump.to/nevent1qqs99t27jrlcxk9u5cgfh6yx0ak9yaf23qcw9s93t94nnyrkjuawaggpz9mhxue69uhkummnw3ezuamfdejj7q3qwsuf2yx9cvaktatkpn6ycaxh04tjl8yd3cg0xw3ztaq0rjc757nqxpqqqqqqz9ctpnk