Children have endured "acts of terror" and "grave violations," the report states. They have been sexually abused and tortured, used as human shields and recruited as child soldiers. More than 10,000 children have been killed.
The report comes amid accounts of new weapons being unleashed by government helicopters on civilian neighborhoods, such as terribly destructive "barrel bombs."
Boys and girls as young as 11 have been detained by government forces, and while imprisoned, suffered beatings, electric shocks, sleep deprivation and rape. Both sides to the conflict have engaged in the "summary execution of children."
The report was presented to the U.N. Security Council last week and released publicly this Monday. U.N. Secretary General Ban Ki-moon described it as showing "unspeakable and unacceptable suffering."