A 6 yr old boy [with an IQ of over 160] becomes one of Mensa's youngest members. http://www.mirror.co.uk/news/weird-news/boy-genius-aged-6-joins-7376455 The boy has been learning pretty fast all his life. When he was one year old, he knew [all?] the colors. When he was 2, he could name all the countries on a map and by the time he was 4, he was taking Mensa tests.