Which innovative program booklet feature was first introduced by the Royal Shakespeare Company in 2018 that revolutionized audience engagement during performances?

In the competitive world of performing arts, theaters and production companies are constantly seeking innovative ways to enhance audience experience and increase engagement. One often overlooked element is the humble program booklet - a product that has evolved significantly in recent years. Test your knowledge about how performing arts venues have revolutionized this traditional customer touchpoint with modern product packaging innovations.

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Augmented reality elements that allowed viewers to scan pages with smartphones to see character backstories and behind-the-scenes content
Edible pages made from rice paper containing flavors related to the play's setting and time period
Heat-sensitive ink that revealed hidden director's notes when warmed by audience members' hands during the performance
Embedded LED lighting that synchronized with key moments in the performance through wireless technology