There’s plenty to enjoy at this month’s Math Teachers at Play blog carnival. Check it out:
This is a Math teachers at play carnival, issue #…which I am going to reveal shortly. See if you can make it from what is known as a single image stereogram. Try focusing your eyes behind the screen.
In this month’s issue: What is the number of this issue? … Sad news … Interesting and relevant news … From the trenches … Math curiosities … Jokes … P.S. … Read more
via CTK Insights
Denise Gaskins' Let's Play Math 
Thank you for the link. I was wondering whether a squizzed stereogram still maintains the concealed image. I see it does – a very good news.
Yep, the image is there — though when I tested it (before publishing the post), it seemed to take forever before I could see the number. My eyes aren’t what they used to be …