A guide for raising 'Jihadi babies' has surfaced online.
The handbook titled 'Sister's Role in Jihad,' teaches Jihadi mothers how to raise extremist children.
The disturbing guide claims that the most important duty of a Jihadi mother is to train her children to "fight the Holy war."
New mothers are encouraged to start instilling the radical message in their children's minds "while they are babies" as by the age of seven they might not be so receptive to the radical message.
"Don't underestimate the lasting effect of what those little ears and eyes take in during the first few years of life!" the guide says.
Heralding the birth of a new generation of 'Caliphate cubs' trained in warfare, the guide recommends showing children Jihadi websites and reading bedtime stories about Jihad, while playing darts is to be encouraged to improve their aim.
The guide recommends introducing violence to children through play, encouraging them to re-enact beheadings with dolls and play with toy guns to practice target-shooting. Parents are advised though that they should "make it very clear who their target should be, and who their target should not be."
Camping is encouraged since it teaches the child how to survive outdoors. The Jihadi training is designed to be 'fun' it says, though it stresses that "fun does not mean music and dancing, as is portrayed by Western children's TV, which mostly teaches shamelessness, anarchy, and random violence."
It's believed that the guide inspired British extremist Runa Khan, who was jailed for five years for posting images of her six children online dressed in jihadi uniforms, and advising an undercover policeman of ways to get into Syria.
The original authors of the textbook are unknown, but it is thought to be used by ISIS and other terror groups to indoctrinate a new generation of Jihadists.
Researchers from U.S-based Middle East Media Research Institute (MEMRI) have warned that the guide is being used to train children in the Middle East.
Steven Stalinsky, executive director of MEMRI, said: "As we move into 2015, Al-Qaeda and its affiliates, ISIS, and other jihadi groups worldwide continue to invest a lot of effort in indoctrination of the next generation of fighters.
"It is important for the West to understand that all these groups want the world to know that this indoctrination is taking place. No matter what happens in Iraq and Syria in the near future, the next generation – the children of Baghdadi and grandchildren of bin Laden - have already been brainwashed to hate the West and to strive for jihad and martyrdom," he explained.
"They have been trained on the battlefield and know how to create bombs and suicide belts and to behead and crucify the innocent. This is something we must be prepared for and understand."
Twitter accounts linked to the terror group regularly feature images of children named 'Ashbal', meaning lion cubs, dressed in combat uniforms and brandishing knives and large machine guns.
The report comes as an Italian mother, whose son was kidnapped by his father and taken to Syria, recently reported seeing an image of her son in an ISIS propaganda poster.
Lidia Herrera said she left the boy with his father last year as she went to visit her relatives in Cuba. In her absence he took his son to Syria to join the extremists. The boy, who is now three, is being brought up by other terrorists after his father died fighting.
A list of approved activities in the Jihadi Mother's Guidebook includes:
- Martial arts training
- Target-shooting (with different kinds of toy weapons)
- Horse-back riding
- Orienteering (learning to navigate your way in the woods)
- Exercise (running, jogging, push-ups, etc.) to build stamina
- Driving (a range of different vehicles)
- Camping / Survival Training (an excellent and enjoyable method of training