If you could have a coin size version of almost any tech, what would you want to have? This includes phones, speakers etc. Keep it realistic so no coffee machines or similar.
#Coin sized tech
mystic canyon
rain peak
Banknotes
frail flower
what coin?
in the US we have the penny (discontinued but still exists), nickle, dime (smaller than the penny somehow), quarter, half dollar, and dollar (half dollar and dollar coins are almost never used but they do exist)
and other countries have different coins that are different sizes too