Ah yes, the concubine discussion with a younger child. A few years ago my son, who I think was about 9 at the time, was at the shore with my in-laws reading a book he had borrowed from the children's / middle grade section of our library. DS asked my in-laws what a concubine was -- and totally caught them off guard! Luckily FIL quickly said "female slave" and they all left it at that (other than the obligatory question to me -- "what are you letting him read?").
My kids liked the library program when they were younger -- they're suckers for those plastic cockroaches! But we don't bother anymore -- the two older ones read for pleasure while the younger one would rather sit with his sudoku and puzzles.
