There are plenty of good wiki's. I suggest you first introduce these to them and give them time to learn, after they get a basic understanding of the bitcoin community then you can start explaining the parts about exchanging and the more complex parts.
It is true that it takes time to slowly so they can understand the basis of the public bitcoin, unlike the case with the gain understanding instantly they will usually get bored quickly, it could just be forgotten bitcoin, unlike the case with providing an understanding that they felt happy but understandable so they will inspired and innovate by itself