Some pictures are worth more than a thousand words.
Palestinian boy Mohammed Kutkut, 14, right, covers his face as he sits next to the name sign of his killed friend Ahed Qaddas in the Fakhoura boys school in Jebaliya, northern Gaza strip, Saturday, Jan. 24, 2009. Three friends of his class where killed when the Israeli army shelled Jebaliya in the past weeks. (AP Photo/Anja Niedringhaus)
Also see this Guardian video, where 10-year-old Mona Samouni describes the killings of 48 members of her family.
And a similar video below, but only in Arabic, French and Spanish.