The goal is simple enough -
Once the package has been opened, and the blocks mixed up, attempt to arrange the four cubes in a row so that all four colors appear on each of the four sides.
Easy, yeah? Maybe take a good look at the cubes, in their package, before you begin; it might be the last time you ever see them in the correct order!
This logic puzzle swept the nation in the late 60's, and now it's back to bring a whole new generation to the brink of insanity in an instant!