If you send a self-addressed stamped envelope (SASE) to:
Rainbow Smphony, Inc.,
6860 Canby Ave. Suite 120 •
Reseda · CA · 91335
And request a pair of free Red/Cyan anaglyph 3-D glasses (in writing Of course) they'll send them to you.
I sent for them and they arrived within 3 days.
They look like this...