First of all he is 9 years old.
He can't stay in one place for more when 5 min.
if he decide to get something he start shout or cry untill i give him what he wants.
He like to talk nonsenses and annoy other people.
Despite the crying and shouting, he sounds pretty normal for a 9 years old. Kids at that age tend to get bored easily, so they will almost never stay in one place for more than 5 min.