Who was Ali Ibn Abi Talib?
He was the successor of Hazrat Uthman Ibn Affan (radi Allahu anhu).
How much did he know the Prophet (pbuh)?
He was six to seven years old when Prophet Muhammad SAW began to take care of him.
What is special about him?
Ali Ibn Abi Talib accepted Islam at the age of 10 years. He was the first young boy who accepted Islam.