There has been an increase in reports of self-introduced urethrovesical foreign bodies, but they are still considered to be rare in children. A special type of foreign bodies are magnetic bodies inserted into the lower urinary tract – a phenomenon which clearly corresponds with an increase in paediatric magnet-related foreign bodies insertion requiring emergency care. We present two adolescent boys with voiding difficulty as a leading symptom following self-introduction of numerous magnetic beads (in the first case) and eyebrow tweezers (in the second case) treated during the last 3 months. Magnetic beads had to be removed operatively, eyebrow tweezers were removed from urethra manually. Our observations confirm that in the differential diagnosis of lower urinary tract symptoms especially in adolescents, the presence of foreign bodies should be taken into consideration.