Mysteries and small children

So I was trying to explain the concept of a mystery to my 10 year old cousin, because I was trying to explain transubstantiation (the conversion started with Old English, wove through about 50 other topics and ended up on mortal sins and the necessity of hell...) But no matter how I tried to explain it, she wasn't understanding. I finally realized it wasn't because she didn't hear the words coming out of my mouth. It was because she didn't see the paradox that most adults automatically see. You tell an adult that the substance changes without the accidents changing and they'll spend hours, days, or weeks puzzling over it, trying to figure out how that's possible. You explain the concepts of substance and accidents and then tell my 10 year old cousin the same statement and she just accepts it. I said, "and it's a mystery because we can't understand it." And she replied, "but you just explained it." I thought at first that she was young and so just not educated enough to recognize the paradoxical nature of God in the form of bread. But I realized, there is no paradox in the Eucharist. There is no paradox in God. The real problem with mysteries is that we can't comprehend the sheer simplicity of God. So if I see a paradox in transubstantiation and my cousin doesn't, I'm really the one not seeing straight. Maybe we just all need to have a little more of the simplicity of a child so we can avoid seeing paradoxes where there are none.