Algodoo

Just cross your eyes until the two white circles make one, and the picture will seem 3-D! (kinda)

It's my first try at this kinda stuff, and it might not be very good, so please tell me what you think of it, and how you think I could make it better. I think the curved bar works well, but the rest isn't so good.(it's supposed to look like there's a hollow bowl, and there's a convex curved bar going across it)

It might take you a bit to get your eyes focused on the picture while they're crossed, but after a bit of work it gets really easy.

It works if you un-cross your eyes, but not as well. (un-cross as in un-focus, or look behind the portrait, like with a magic eye poster)