An idea that has doubtless occurred to many people many times (but Paulette & I came up with it independently some months ago): a bumper-sticker or poster showing a dynamic expanding/exploding cerebral cortex, above the caption:

This is Your Brain on Books!

(cf. Boston Public Library (20 Jun 2002), GotLibrary (17 Sep 2003), ExtraCurricular (11 Feb 2005), ...)

TopicHumor - TopicLibraries - 2006-01-06

(correlates: AsimovOnLibraries, Buss and Ride, ExtraCurricular, ...)