Saw something really cool in a magazine...need some!!!

I saw something cool in a magazine, however, I didn't have a use for it
at the time, but now I do, and I need some of that stuff, but can't
remember where I saw it.

It was some kind of clear plastic, flexible, I think it needed a
battery although I'm not sure, and, as advertised, it would create
multi-colored patterns.  And, it didn't strike me as having an array of
LEDs, but more like a polymer, and, yes, I know there is something
called "organic LED material," but that's probably too expensive.
Anyway, I want to know if anyone has seen that advertisement, or has a
clue as to what it was, regarding some inexpensive plastic material,
like a sheet of it, that could produce multicolored effects.
Multicolored, as in, more complicated than just a red, a white, and a
blue LED, although, I didn't look at it long enough to say for sure.
And, I wouldn't call it a fiber optic material, but definitely
something like that.  I think the ad showed it being used on a bicycle
wheel, or at least mentioned that you could use it for that, and it
could flash different colors, simultaneously, and randomly.  Also, the
magazines I usually read are Nuts and Volts, Circuit Cellar, or maybe a
Jameco catalog, hobby/robotics, or PC related stuff, but I've retraced
my steps and haven't been able to find that little advertisement again.
 It wasn't a full page ad, like 1/4 page or 1/8 page.

If anybody happened to see that ad, or has a clue as to what that stuff
was, please let me know.   I just set up an email address just for this
question, and it should be active shortly, and it's -> el_roboto_loco
at yahoo dot com.  And, just to make doubly sure, you can also reach me
as almo6914 so, please CC:  almoREMOVETHIS6914@yahoo.com

Thanks,
Alan