The idea of "concept of book" is taught in most good Ed. School classes about reading. If you don't know to read from right to left, top to bottom, and whether to start front or back, you can't work the damn thing. You and I got the training from parental exposure. There are many children who do not have "reading parents" to stack their environment with cues.
A child seeing Mom work a Kindle does not get the same cues as when Mom is reading a book or magazine.
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