Why Must Read Magic Eye: A New Way of Looking at the World?

My 12-year-old son doesn't have much patience for a lot of things, so I was concerned about whether he'd be able to see the 3D pictures, or persevere long enough to do so. While it took a few minutes, it was cool to see him get instantly excited when he finally did! Now he wants to order another Magic Eye book. I see there are even posters, which might be cool for his room. Both the books and the posters would be instant conversation pieces and fun challenges for his friends when they come over to visit (once the pandemic's over).