The boys, aged just 10 and 12, were brutally punished after failing to carry out the brutal task in the ISIS stronghold in western Mosul.
The boys were part of a group of children being trained by the terror cult to fight against advancing Iraqi soldiers, who have already recaptured vast swathes of ISIS territory.
Both youngsters had their hands hacked off in another sick punishment by the extremist cell.
Public amputations are a typical ISIS punishment technique although it is usually reserved for thieves.
The depraved cell recently released a shocking video showing prisoners being killed by children as young as nine.
The jihadis high school, thought to be in Raqqa, Syria, has children sleeping in dormitories.
Classes involve reading the Koran before studying killings and pledging allegiance to the twisted ISIS group.
Daesh forces have suffered a number of devastating setbacks in recent weeks after a number of leading figures were killed.
On Monday, news emerged that the terror cell’s chief decapitator had been stabbed to death in western Mosul.
The depraved jihadi, nicknamed “Abu Sayyaf”, was reportedly killed by unknown individuals west of the ancient city of Nineveh.
A security source told Iraqi News: “An unknown armed group killed on Sunday the Islamic State’s most famous decapitator, the so-nicknamed ‘Abu Sayyaf’.