This brain-teaser COBRA belongs among the most popular brain teasers of present time. It consists out of 27 pieces of wooden cubes threaded on a rubber string. In the beginning the player unfolds the cube into a snake. The teaser then lies in subsequent re-composing of the snake into the cube. We offer 7 coloured versions arranged from the easiest to the most difficult: blue, green, red, violet, yellow, orange and brown. Enjoy the game!