A two-year-old has become the youngest member of British Mensa after taking an intelligence test that ranked him smarter than  Barack Obama and David Cameron.

While most toddlers are busy learning to walk  and scribbling on walls, child prodigy Adam Kirby enjoys reading Shakespeare,  learning Japanese, Spanish and French, and even potty-trained  himself.

Adam, from Mitcham, south London, took the Stanford-Binet IQ test and scored 141, 10 points higher that two of the most  powerful world leaders and four points short of Genius level, despite not even  being able to speak in full sentences yet.

Youngest Mensa member: Adam Kirby, aged two, has an IQ  of 141, just four points short of Genius level

Adam’s parents Kerry-Ann, 31, left, and Dean, 33, say  they’re ‘bright’ but nothing like their young son

The toddler’s parents Dean, 33, and  Kerry-Ann, 31, say they realised their son was different when he’d potty-trained  himself after reading a book on the subject aged just one.

MENSA: THE WORLD’S BIGGEST  GENIUS CLUB

Mensa was founded in England in 1946 by  Roland Berrill, a barrister, and Dr Lance Ware, a scientist and lawyer.

The society welcomes people from every walk  of life whose IQ is in the top two per cent of the population.

Albert Einstein apparently had an IQ of 160,  while former US presidents Abraham Lincoln, Benjamin Franklin and Bill Clinton  also racked up very high IQs – mustering 128, 160 and 137  respectively.

Napoleon Bonaparte scored 145 and Sigmund  Freud had a score of 156.

There are currently more than 1,000 members  of Mensa aged under 18.

Children under the age of 10-and-a-half can  join Mensa by submitting prior evidence of their IQ score being in the top two  per cent.

Adults and children over the age of  10-and-a-half, take the Mensa Supervised IQ Test.

The youngest person to ever join British  Mensa was Elise Tan Roberts in 2009 aged 2 years and four  months.

At 29 months, Adam is able to spell 100  words, has conquered most of his times tables up to 10, has learnt his periodic  table, and even mastered a world map puzzle designed for adults.

After he scored so highly in the IQ test he  was invited to join British Mensa, the society for those with outstandingly high  IQs, and became the youngest boy ever to do so.

The youngest British person ever to join was  a girl, Elise Tan-Roberts, now six, who joined Mensa aged two years and four  months in 2009; Adam joined at two years and five months.

His father, Mr Kirby, an IT consultant from  Mitcham, London, said: ‘Adam’s abilities are outstanding and we’ve been actively  developing his intelligence since he was 10 weeks old – but we’re certainly  delighted for him.

‘While most children are just learning to  stand up or crawl Adam was reading books, his development was just  mind-blowingly quick.

‘We used to show him cards with the  words  hippopotamus and rhinoceros on them and he could identify the  right animals  most of the time.’

The Stanford-Binet exam, originally  developed by French psychologist Alfred Binet and revised by Stanford  University’s Lewis Terman in 1916, has become renowned for being able to accurately determine a child’s intelligence levels and predict future  grades.

Adam’s score of 141 – just four shy of the  ‘Genius’ category – puts him head and shoulders above the average Brit’s IQ of  100.

His remarkable level means he becomes only  the 19th UK child ever to join Mensa before even going to school.

Adam has already mastered most of his times tables and  is reading books designed for seven-year-olds

The gifted toddler can identify countries on a map and  knows the planets of the solar system

Little Adam started to read when he was just one, and  can type words and numbers on a keyboardMr Kirby said: ‘Neither my wife nor I are  Mensa members. We are both bright, but Adam is significantly more  advanced at  his age than we were.

‘I think the main reason for his rapid  development is that we have found effective ways to make learning  enjoyable.

‘Adam is able to progress at his own pace  whenever he chooses to and in areas of his choosing.

Despite his astonishing intelligence, Adam’s parents say  he is a happy, athletic and playful little boy

Adam’s IQ score of 141 puts him above US President  Barack Obama and British PM David Cameron, right

‘He knows the planets of the solar system,  dozens of pairs of words with opposite meanings – he has a great sense of humour  and most importantly he is self-motivated, athletic, very happy and  playful.’

Adam, who is reading the Oxford  Reading Tree  series designed for seven-year-olds, is already in the top  1.3 per cent of the  population.

And his parents expect him to score even  higher once his communication skills develop fully.

Bright family: Mr and Mrs Kirby have high hopes for  their younger son Ethan, who is not yet two months old

Adam started reading aged just one, right, and is now  reading Oxford Reading Tree books for seven-year-old

John Stevenage, British Mensa’s CEO, said:  ‘The members of Mensa always welcome new additions as we aim to stimulate people  in an intellectual and social environment.

‘We are look to help gifted children and  encourage them to develop at an extraordinary.

‘We look forward to Adam joining Mensa and  expect him to have a very bright future.’

Adam’s younger brother Ethan is not yet two  months old, but his parents are expecting great things.

Mr Kirby said: ‘I expect that he will develop  at a faster pace than Adam as my wife and I are now more experienced, and he has  his older brother Adam to learn from.

‘In addition, I’ve read that second children  tend to be in a hurry to catch up with their older siblings, so I think this  will keep him on an upwards curve.’

WHAT HE CAN DO: ADAM’S SKILL  AGED 29 MONTHS

– Adam has a reading age of at least a  five-year-old and reads books aimed at seven-year-olds

– He is able to spell over 100 words and also  knows many phonics

– Knows some of his times tables  (2,3,4,5,10)

– Recognises 2D shapes from a circle to  12-sided dodecagon

– Knows numerous 3D shapes

– Can count to more than 1000 in English, up  to 20 in Spanish & Japanese and up to 10 in French

– Can add and subtract simple  numbers

Adam can type words and numbers into a computer already,  and has been able to for a while

– Knows the difference between primary,  secondary and neutral colours and can name them

– Recognises words when spelt them to him  e.g. if his parents spell ‘ninety seven’ he responds 97

– Can write some letters and numbers by hand  and type words and numbers on a keyboard

– He can recite his favourite nursery  rhymes

– Adam can read simple fractions

– Knows months of the year and days of the  week, and the planets of the solar system

– Knows dozens of pairs of words with  opposite meanings

– Knows some elements in the periodic  table

Read more: DailyMail