A three-year-old boy who can count to 200 and name every country in the world has become one of the youngest members of Mensa.
Sherwyn Sarabi, from Barnsley, South Yorkshire, is ranked among the top 1% of cleverest people in the world after tests revealed he had an IQ of 136.
His mother Amanda Sarabi said she was really proud of her gifted son, who she described as "amazing".
Sherwyn, who has a reading age of six, began speaking at the age of 10 months and was talking in sentences at 20 months. By the age of two, Sherwyn could read, count to 200, recognise and name countries, flags, planets in the solar system, parts of the body and internal organs.
Mrs Sarabi, 36, a former teacher, said: "His general knowledge is amazing. He knows about everything. It's not like talking to a three-year-old. He doesn't even watch children's programmes, he watches the news. The weather is his favourite, especially the world weather. He loves that."
She added: "We take every day as it comes. I've never forced teaching anything on to him. If he comes to me and asks me about a topic, I teach him to the best of my knowledge. Sometimes I have to look it up because I don't know the answer but I explain it to him, then he's happy."
Mrs Sarabi said she and her husband, Davoud, 37, who was studying construction management until he was involved in an accident, are well-educated but "nothing extraordinary".
After his third birthday, Sherwyn was tested on the Wechsler Pre-School and Primary Scale of Intelligence, which placed him in the 99th percentile with an IQ of 136. The normal range using this test is between 85 and 115, with the average IQ being 100.
He has now joined the high-IQ society Mensa, which has only 100 members aged under 10 out of 22,000 members across Britain.
Sherwyn has also started attending the Rastrick Independent School in Brighouse, West Yorkshire, where a special lesson plan has been designed for him.