Rubik describes the room in which he prepared for his classes as 'a child’s pocket, full of marbles and treasures', including 'innumerable cubes: cubes made of paper, of wood, monochrome or coloured, ...

Following is a transcript of the video. Narrator: This is the iconic Rubik's Cube. A 22-year-old in Australia can solve it in a record 4.22 seconds. Others might spend hours, days, weeks ...