Foreign body (FB) in the urinary bladder (UB) is uncommon and rarely reported in pediatric patients. FB migration into the UB is an extremely rare and unpredictable condition that needs a high index of suspicion with meticulous history taking and clinical reasoning, so diagnosis may be challenging. In this study, we report two cases of male pediatric patients from Sudan with FB in the UB, with a history of penetrating perineal trauma, both were presented with irritative lower urinary tract symptoms, history of penetrating perineal trauma, and unremarkable clinical examination. Both were diagnosed by abdominal Ultrasound study (USS) and confirmed by cystoscopy. One child was treated by endoscopic extraction, while the other was treated by open surgical extraction. The outcome of treatment of both the cases was satisfactory.