Tilt to read
If you tilt your device (page, sheet, screen), you may be able to read a secret message.
Does it require an electronic device? No
A short task for perceptiveness, which may be an introduction to the next riddle. Students receive “stretched” word / message / puzzle. To decode the message, it is necessary to tilt the page.
https://codepen.io/ninivert/details/JEPzxO