The station announced Monday that the first prize winner in the contest received a rifle and $700, the second prize winner got a rifle and $500, and the third prize winner received two bombs.
All three children also received religious books.
Al-Shabab is battling Somalia's weak, UN-backed government. The militants have recently been weakened by famine in territory they control.
Somalia has been plagued by violence and religious extremism, with a leader of the country's Islamist insurgency threatening late last year to attack the United States.
"We tell the American President Barack Obama to embrace Islam before we come to his country," said Fuad Mohamed "Shongole" Qalaf.
- Israel News, Ynetnews