A 2-year-old from the U.K. recently became the youngest member of Mensa, which accepts people with an IQ of 132 or above. The ...

children enter the preoperational stage at around two years old Despite being over 70 years old, Piaget's theory is "still one of the prevailing theories in terms of cognitive development," Dr Sam ...

Birtill, a two-year-old from the UK, has become the youngest male to join Mensa, achieving a record-breaking IQ score.