Tools > A UV Torch
October 30th, 2021
If you’ve never played the “What’s UV-reactive in your wallet?” game, you’re missing out. Banknotes are a good place to start, sure - but ID cards, credit cards, and other things often light up too. Canadian passports are a full-on light show. Walk around the house in the dark, and discover what fluoresces. All for less than $5 including shipping (but not batteries).
Throw in a UV marker too. A permanent marker is good for adults, but there are cheaper versions for kids out there. (DealExtreme will sell you a 7-pack for $11; Amazon sells them for a little more.) For adults, this is now a security-conscious gift: you can postcode your expensive items. For kids, it’s a spy kit: invisible notes. Give the kid a magazine as well, and you’ve got a fun afternoon of “Guess how I defaced this celebrity”.