I think, unlike adult novels that easily transfer to e-books, there will always be a good market for children's book, especially picture books. So long as they were decently priced I would definitely buy from there. Also, maybe it could also doa trade in second-hand childrens' books.
Anyway, this is all very interesting, as a friend of mine has talked about doing this very thing in this shop so maybe she's spreading the rumours herself! If not, I'll tell her to get in quick!