Recent socio-technological developments have shown growing interest in interactive pervasive computing scenarios supported by public displays. One of the main challenges in the design of public display systems still is to engage users to interact and be motivated to do so. In this work, we describe application features, implemented in our public display system, which aim to convey awareness of local and remote peers' interactions with an educational video installation to engage users to interact. This is facilitated by dynamic pop-up notifications and visualizations of interactions on the display screen. A first deployment and study showed that users found these presentations of peer interactions to be engaging, both with the display system as well as the social context around it.