Does the Crayola 3D sidewalk chalk work?

Does the Crayola 3D sidewalk chalk work? That is what I wondered when I saw the ad on TV.

This review is from http://atoyinfo.blogspot.com/2008/06/crayola-3-d-chalk.html

Wow..I was amazed at this product. I've seen many commercials on TV and thought this would be a gimmick...and that the 3D effects would be uneffective.
However, boy was I surprised! It works like it says it does...and my kids LOVED it. When you wear the INCLUDED 3D glasses...everything really works as described. I love it! The kids love it!
This is probably the coolest toy all year so far...I'm picking up a few more packs on Amazon as I right this review.
Overall this product is just what everyone says it is...AWESOME. Your kid will love it.

About the product from the manufacturer:

Outdoor Art Goes 3D! Toy Wishes Magazine Names 3D Sidewalk Chalk “Hot Summer Toy”

New Crayola 3D Sidewalk Chalk will have kids saying “Sweeeet,” as they watch their artistic creations float in mid-air! Recently named to Toy Wishes magazine’s Spring 2008 Hot Dozen list -- the editor-selected hottest toys of the summer season -- the dual-ended, multi-colored sticks of chalk combine the right colors for creating eye-popping 3D driveway art that literally “rises above” anything they’ve ever created outdoors. Cool, Crayola-inspired 3D glasses make the magic happen. Put on a pair and watch the “warm” colors rise, while “cool” colors recede, creating the illusion of 3D. Seeing is believing! Crayola 3D Sidewalk is available in two assortments:

Classic Set of 5 sticks of dual-ended 3D Sidewalk chalk (10 colors in all), a pair of durable plastic 3D glasses and a “How To” booklet that shows kids how to make their very own 3D scenes. ($4.99)

Deluxe Outdoor Activity Sets with 8 pieces of dual-ended 3D Sidewalk chalk (16 colors), a bottle of Crayola Sidewalk paint, a paint brush, 3D glasses and a “How To” booklet, plus 4 giant stencils in Jungle Safari or Underwater Adventure themes. ($9.99)