Friday! This word tastes like the most delicious dish ever cooked unless you are going to work tomorrow. For most people Friday is likely to be the day of long-awated relaxation and rest, but we remember how important it is to keep your brain working despite any weekends and other holidays. So let your grey substance work a bit before you let have a great rest! And this amazing video will help you both train your brain and get some truly unusual and interesting information!