this is why i think we need paper btc reciepts/wallets
that people can see and touch

shop would just scan and transfer funds
(checking for any pending transactions etc. to validate)
then just print off the change on fresh paper wallet

this would make it easier for many to get introduced to btc

oh
and when trying to explain to someone why they should use bitcoin
dont waste your time trying to explain what bitcoin and blockchain is
or who you think satoshi is, or even your price predictions

just show them how to buy something first (except altcoins).
then do the rest