Elise Tan Roberst is a 2 year old child from Britain with 156 IQ. She is the youngest member of MENSA, the oldest and best known high-IQ society in the world. At 2 years old, Elise can also recite the phonetic alphabet, count to 10 in Spanish and memorize the capital of 35 countries.
To give you an idea about how intelligent she is, consider this, Albert Einstein, named the greatest scientist of the 21st century has an IQ of 160. See her video below.