12 years old? Go with the pictures. The live pictures of the fetus in the womb. The one with the baby’s hand clutching the surgeon’s hand as he works on it inside the womb.
After that, show some of the tools of the abortion trade. Sort of like in the movies - no graphic violence but you see the victim, then the weapon, then a blank screen. Just stay away from the gory stuff.
If you (or more importantly your kid brother) are so inclined you can toss in some Biblical references with ideas like God knew us in our Mother’s womb, etc.
Good ideas. Thanks. I was really floored when my brother seemed to say that abortions weren’t killing a child. I really haven’t been able to respond effectively yet. Thanks.