It's interesting: Rubik's Cube/Это интересно: кубик Рубика.

 
Today the famous puzzle game "Rubik's Cube" is celebrating its 40th anniversary. Hungarian sculptor and architect Erno Rubik invented this toy on May 19, 1974, and today it is the most popular puzzle game in the world.
Puzzle fans participate in competitions in  speedcubing which is organized by the  World Cube Association (WCA). Speedcubers also have got their secrets and techniques . Currently record in speedcubing  3 × 3 × 3 is 5.55 seconds.
Let's watch the World Records in Speedcubing:

And here is the site for Rubik's cube solutions: http://www.rubiksplace.com/
Have a nice time and train your brain!;)