3D technology is making a comeback. Hannah Montana Concerts have put the 3D glasses back on audiences, but who wants to watch everything in red and blue?

Crayola has always made colors that stand out above the rest, and this new product takes standing out to the next level, namely, the 3rd dimension. Now, your kids can color designs on the sidewalk, driveway, or easel, put on the included 3D (prism, not red/blue) glasses, and have the colors jump out at them.

The magic here isn't in the chalk--it's in the prism glasses. The included chalk pieces have 2 colors on each, intended for maximum variation in effects, but we have a huge bucket normal sidewalk chalk, and we found that it works just as well. In fact, we tested the glasses with colored pencils and got the same result. It even added dimension to a cake mix box. The glasses alone will keep kids of all ages enthralled for hours.

The glasses work by causing colors on the red end of the spectrum to rise while the blue end of the spectrum sinks. It's all basic physics of light, but it's a great effect that takes a classic toy with lots of creative potential and gives it new life. Start with the included chalk, then buy more regular chalk, which will work just as well. (We have tested many brands of chalk, colored pencils, and crayons and only buy Crayola for our kids as their colors are consistently more vibrant.) For rainy days, get out crayons, markers, or paint, and take the same approach for 3D masterpieces.

Our kids have a great time with both the chalk and the glasses, and even our teenage daughter likes looking through the glasses at all kinds of objects. These are a great buy, and since you can use them with any colored medium (construction paper, anyone?), they have much more value than just a fair-weather outside toy.