These message cards are just little ice-breakers. They look a bit like QR codes until you raise them to eye level and read the “magical messages” from bottom (indicated by a number) to top.
Decades ago, these things took me forever and a day to draw by hand. But then I could legitimately challenge my students to draw a message of their own. Nowadays, I use the computer so they just take forever. However, I’ve lost the moral authority to launch my drawing challenge. But the “wow” moment when a student actually sees the message still makes it worthwhile.
If you print your magic messages on card stock, you can also use them as little reward records. Once my students accumulate ten stickers or stamps on the back of their magic message card, they can redeem the card for a small treat or a bonus point on a future test.