A company in California named Rainbow Symphony offers a wide array of novelties, including many 3-D products. They sell paper 3-D glasses at pretty low prices, about 40¢ apiece... but the minimum order is 50, and then they hit you with shipping charges, so you can't buy any without spending at least 30 bucks!

But what if you only want one pair? Well, then, they're free. That's right, totally free 3-D glasses. The instructions are here on their Web page. Other than paying for two 42¢ postage stamps, you're not out any money at all.

To get the free glasses, you'll just need to mail a self-addressed stamped envelope to:

Rainbow Symphony, Inc.
ATTN: FREE 3D GLASSES
6860 Canby Avenue, Suite 120
Reseda, CA 91335

Also -- and this is important -- you should include a cover letter specifying exactly what sort of glasses you want! They offer different sorts of paper glasses, so you have to tell them you want the "Red/Blue Anaglyph" glasses!

I sent them a SASE on June 24, 2008, and my free glasses arrived in the mail on July 3, so it took nine days.

I should mention that I have nothing to do with this company, no connection or dealings with them at all. I just found them doing a Google search for "free anaglyphic glasses."

I should also mention that the U.S. First Class postage rate is not 41¢, as their website claims; it rose to 42¢ in May of 2008. Be sure to use 42¢ stamps (or whatever the current rate is when you read this; the Postal Service raises rates annually every May).

If you know of any other free anaglyph 3D glasses offers out there that I should post about, please leave a comment on this post and let me know.

More options for getting 3D glasses can be found on my "How to Get Your 3-D Glasses" page.