News for hackers. Stuff that matters.
Re:"We have a thermal printer hooked up to the internet, you... by szszrk on Thursday October 19, 2023 @08:59AM (#37942281)
In my experience yes. Old receipt roles fade even stored in a warehouse. I would try that anyway, as an experiment.

A cheap thermal printer for kids is around 10-20 USD (got one for such price with 10 rolls of paper, half of which is sticky paper), has bluetooth, usb and battery. Fits in a pocket. Would be fun to stick such qr code inside some not important book left lying around.

Re:"We have a thermal printer hooked up to the internet, you... by Sabinus on Friday October 20, 2023 @12:29AM (#37952403)
I would caution about giving children receipt paper. It may contain a lot of BPA (or replacements).

https://www.smh.com.au/business/consumer-affairs/controversi...