"It takes about a month to break in a brand-new Rubik's Cube, " said 23-year-old Australian Tim McMahon.

WSJ: One Rubik's Cube, Many Knockoffs, Quintillions of Possibilities

The Rubik's Cube--that maddening twistable puzzle that requires mental and digital dexterity to twist and turn bands on a cube until each side is a solid color--is making a comeback.

FORBES: That 1980s puzzle fad is back. No batteries required.

And just for fun, we brought you the world's largest Rubik's Cube mosaic -- which stands over 13 feet high by 200 feet wide and is made from 85, 794 cubes.

ENGADGET: Inhabitat's Week in Green: Biobot, Nintendo Power Glove and an inflatable bathroom bubble