When Einstein was five years old and sick in bed, his father showed him something that sparked his interest in science: a compass. When Einstein was five years old and ill in bed one day, his father showed him a simple pocket compass. What interested young Einstein was whichever the case was turned, the needle always pointed in the same direction.
He thought there must be some force in what was presumed empty space that acted on the compass. This incident, common in many "famous childhoods," was reported persistently in many of the accounts of his life once he gained fame.
2) Einstein Failed his University Entrance Exam
In 1895, at the age of 17, Albert Einstein applied for early admission into the Swiss Federal Polytechnical School (Eidgenössische Technische Hochschule or ETH). He passed the math and science sections of the entrance exam, but failed the rest (history, languages, geography, etc.)! Einstein had to go to a trade school before he retook the exam and was finally admitted to ETH a year later.
3) Einstein had an Illegitimate Child
In the 1980s, Einstein's private letters revealed something new about the genius: he had an illegitimate daughter with a fellow former student Mileva Marić (whom Einstein later married).
In 1902, a year before their marriage, Mileva gave birth to a daughter named Lieserl, whom Einstein never saw and whose fate remained unknown.