The youngsters, some of whom appear to be aged around nine, are staring blankly ahead of them in the slick film called Cubs of the Caliphate.
In one exercise, the children are showing standing around in a circle while a jihadi fighter draws a circle in the sand as if plotting out an attack.
Another clip shows the children loading guns and taking part in exercises.
Although a child is singing in french on the film, warning the West of future terror strikes, the captions on the video are in English.
Photographs of world leaders including Barack Obama, Vladimir Putin and Francois Hollande are also depicted.
ISIS often uses children in its propaganda videos and also suicide bombing missions.
An ISIS photographer recently captured the horrifying moment a child suicide bomber kisses his father goodbye before ramming his truck into Syrian soldiers killing himself and them instantly.
The youngster, who appears to be aged around 11, is identified as Abu ‘Imara al-‘Omri in an ISIS propaganda shot which boasts how the boy helped them wrestle back control of the village of Ghazl near Aleppo, in Syria.
The shocking images show the primary school age child toting a gun and gazing wistfully into the distance, while another shot shows his fortified truck, which would be packed with explosives, and reinforced to defy a hail of bullets from desperate troops trying to ward off an attack.