QRPMe, Rex Harper's site for QRP (reduced-power) amateur radio kits, has a nifty little prototyping board that fits inside of a mint tin and could be used
How to Build Your Own Mini Altoids Guitar Amp for About $5 « Mad Science :: WonderHowTo
MintyPi Tiny Raspberry Pi Zero Games Console In A Mint Tin, 48% OFF
How to Make a Portable Charger With An Altoids Tin – New Hobby Box
How to Build Your Own Mini Altoids Guitar Amp for About $5 « Mad Science :: WonderHowTo
Altoids Tin Projects: Tic-tac-toe Travel Game
tiny zvs/royer oscillator (on top of altoid tin for scale) : r/ElectroBOOM
mintyPi Hides A Gaming Device Inside Altoid Tins - SlashGear
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mintyPi Hides A Gaming Device Inside Altoid Tins - SlashGear
ALTOIDS Tin Part 15 Version FM Transmitter
Needed individual pieces for moveable chess board I'm prototyping. Accidentally made a flexible sheet. : r/3Dprinting
Adafruit Perma-Proto Half-sized Breadboard PCB – Jacobs Hall Material Store