Taking the side of a Creationist here. Evolutionist claim (correct me if im wrong here) that we all started out from a single oranism and eventually over billions of years came in to human life. The question I always get asked is why is there such a large fossil gap. I think that means why if, let's say Giraffs had small necks, but evolved to larger necks, why are there no fossils for the middle stages?
We have repeated this many times. Not at an 8th grade level, but a first grade level. We keep hoping that SOMETIME you will finally get it.