Contemporary immersive theatre often limits audience agency to passive observation or spatial navigation, leaving social co-presence underdesigned. We present The Banquet, a co-located participatory sound theatre that turns culturally grounded ritual gestures—raising and clinking cups—into an interaction grammar for multi-user storytelling. Inspired by Dream of the Red Chamber, the system uses Interactive Audio Augmented Reality (IAAR) to embed narrative logic in embodied action, supported by high-precision tracking and a distributed Wi-Fi audio broadcast architecture. Layered spatial audio and subtle acoustic cues enable strangers to coordinate narrative progression without screens. We discuss how formalizing social rituals as tangible interfaces can support embodied negotiation and collective meaning-making in shared space.

We introduce DuoMorph, a design and fabrication method that synergistically integrates Fused Deposition Modeling(FDM) printing and pneumatic actuation to create novel shape-changing interfaces. In DuoMorph, the printed structures and heat-sealed pneumatic elements are mutually designed to actuate and constrain each other, enabling functions that are difficult for either component to achieve in isolation. Moreover, the entire hybrid structure can be fabricated through a single, seamless process using only a standard FDM printer—including both heat-sealing and 3D/4D printing. In this paper, we define a design space including four primitive categories that capture the fundamental ways in which printed and pneumatic components can interact. To support this process, we present a fabrication method and an accompanying design tool. Finally, we demonstrate the potential of DuoMorph through example applications and performance demonstrations.

Shadow puppetry, a culturally rich storytelling art, faces challenges transitioning to the digital realm. Creators in the early design phase struggle with crafting intricate patterns, textures, and basic animations while adhering to stylistic conventions - hindering creativity, especially for novices. This paper presents Lumina, a tool to facilitate the early Chinese shadow puppet design stage. Lumina provides contour templates, animations, scene editing tools, and machine-generated traditional puppet patterns. These features liberate creators from tedious tasks, allowing focus on the creative process. Developed based on a formative study with puppet creators, the web-based Lumina enables wide dissemination. An evaluation with 18 participants demonstrated Lumina’s effectiveness and ease of use, with participants successfully creating designs spanning traditional themes to contemporary and science-fiction concepts.