Now he had forgotten about it and her toilet offended him, but he concealed his vexation when he remembered that he had himself insisted on their securing a box and going because it would be an instructive and aesthetic pleasure for the children.
There are no more uses of "instructive" in the book.
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And very instructive.
Rick Yancey -- The 5th Wave
"Let’s table that thought for a second, because that’s instructive, the fact that you were aware of the groups, but didn’t seek them out.