It's 2016, and I still can't see this sh*t.

I think there's a study that says that if you can't see optical illusions you might be schizophrenic. Particularly, look up the hollow mask illusion

I'm on mobile and it's super hard to see them

what exactly am i meant to be seeing?

Looks like a sailboat to me..

I don't see a specific thing. Its llike looking down on a canyon with a mountain range in the center

this was my childhood

If I completely 100% have my eyes unfocused I see it, but other that that I don't

Guys, most of the time these only work if your vision is the same in both eyes. If you have better eyesight in oneeys than the other, then you can't see them properly.

This is one of the few times having a lazy eye actually comes in handy.

Make it big, go quite close and then make your eyes cross eyed for a bit ( vary in how hard you make them cross) and then slowly pull away from your screen and it should become 3D! Loved these books as a kid