The terrorist group released the video after the FBI foiled plots to sell 'dirty bombs' to ISIS.
In the latest social media taunt from ISIS, a child was recruited to make threats against President Obama.
In the video, the boy, who looks to be about nine or 10 years old, poses with a rocket launcher that probably weighs more than he does.
He calls Obama a "dog" and threatens: "We will cut your filthy head."
In another newly released video, alleged black-market smugglers selling dirty bombs targeting America are taken down.
Read: Texas Inmate Apologizes to Victim's Family Before He's Executed for Killing Man in $8 Robbery
Gangs with suspected links to Russian intelligence tried to sell the nuclear material to ISIS - but the plot was foiled by the FBI and local authorities.
Security expert Karen Greenberg told INSIDE EDITION: "The biggest damage of a radiological device going off would be psychological, in terms of terrorizing everybody about what it had contaminated."
Watch Below: Man Accused of Joining ISIS on Honeymoon Is 'A Sweet Kid,' Friend Says
