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We present Sonic Straws, a beverage-based gustosonic system that allows users to experience playful personalized sounds via drinking through straws. The system consists of two straws, a customized lid, and a holder containing a microcontroller. It performs a sensing process via the two straws connected to the microcontroller to sense capacitance, which then generates sounds played back through a speaker. Our aim is to support a playful way of drinking in everyday life because we believe that interactive technology offers unique opportunities to enrich drinking experiences. Ultimately, with our work, we aim to inspire and guide designers working with playful gustosonic interactions to experience eating/drinking as play.

Ingestible sensors are pill-like digital sensors performing sensing functions inside the human body. Such technology is becoming increasingly common in clinical uses. However, we believe there exists an opportunity to also investigate ingestible sensors as design material for bodily play to facilitate intriguing bodily experiences. This argument is inspired by a long history of utilizing the intersection of medical technologies and play to bring about intriguing bodily experiences. By designing and investigating the user experience of three playful systems around ingestible sensors, we articulate a preliminary framework showing how ingestible sensors can be used as design material to support the design of playful bodily experiences.

There is an increasing trend in HCI to combine eating and technology. We highlight the potential of interactive technology to support an experiential perspective on eating, in particular, how interactive technology can support experiencing eating as play. To understanding this, we reflect on four playful interactive eating systems we designed and two other works to articulate five strategies: make eating challenging, break cultural norms, design across eating stages, reduce eating autonomy, and playfully extend the social aspect. For each, we also include practical implementation options to provide designers with initial guidance on how they can begin to support experiencing eating as play. Ultimately, with our work, we aim to facilitate a future where eating is more playful.

There is an increasing trend in utilizing interactive technology for bodily integrations, such as additional limbs and ingestibles. Prior work on bodily integrated systems mostly examined them from a productivity perspective. In this article, we suggest examining this trend also from an experiential, playful perspective, as we believe that these systems offer novel opportunities to engage the human body through play. Hence, we propose that there is an opportunity to design "bodily integrated play". By relating to our own and other's work, we present an initial set of design strategies for bodily integrated play, aiming to inform designers on how they can engage with such systems to facilitate playful experiences, so that ultimately, people will profit from bodily play's many physical and mental wellbeing benefits even in a future where machine and human converge.

Bodily play systems are becoming increasingly prevalent, with research aiming to understand the associated player experience. We argue that a more nuanced lexicon describing "bodily play experience" can be beneficial to drive the field forward. We provide game designers with two German words to communicate two different aspects of experience: "Erfahrung", referring to experience where one is actively engaged in and gains knowledge from; and "Erlebnis", referring to a tacit experience often translated as "lived experience". We use these words to articulate a suite of design strategies for bodily play experiences by referring to past design work. We conclude by discussing these two aspects of experience in conjunction with two previously established perspectives on the human body. We believe this more nuanced lexicon can provide a clearer understanding for designers about bodily play allowing them to guide players in gaining the many benefits from such experiences.

Human-Computer Integration (HInt) is an emerging paradigm in which computational and human systems are closely interwoven. Integrating computers with the human body is not new. however, we believe that with rapid technological advancements, increasing real-world deployments, and growing ethical and societal implications, it is critical to identify an agenda for future research. We present a set of challenges for HInt research, formulated over the course of a five-day workshop consisting of 29 experts who have designed, deployed and studied HInt systems. This agenda aims to guide researchers in a structured way towards a more coordinated and conscientious future of human-computer integration. Human-Computer Integration (HInt) is an emerging paradigm in which computational and human systems are closely interwoven. Integrating computers with the human body is not new. however, we believe that with rapid technological advancements, increasing real-world deployments, and growing ethical and societal implications, it is critical to identify an agenda for future research. We present a set of challenges for HInt research, formulated over the course of a five-day workshop consisting of 29 experts who have designed, deployed and studied HInt systems. This agenda aims to guide researchers in a structured way towards a more coordinated and conscientious future of human-computer integration.

In the field of human-computer interaction, the term “integration” describes an emergent paradigm in which the human and the computer are tightly coupled. Our previous research has contributed to this paradigm through the design of “bodily integrated” systems, where the human body and the computing machinery are coupled in a way that allows bidirectional actuation. In this article, we build on this design research: we identify gaps in knowledge regarding bodily integration design and propose, in response, two key dimensions along which bodily integration systems can be categorized: bodily agency and bodily ownership. Conceiving each dimension from low to high allows us to define a four-quadrant design space that highlights key user experiences of bodily integration: Super-Body, Tele-Body, Chauffeured-Body, and Possessed-Body. We demonstrate how this design space can be used to analyze bodily integration design using three of our own bodily integration systems as illustrative examples. We also identify seven design strategies for interaction designers to design future bodily integration systems: turn-taking, safety, ease-in, movement, sensations & perceptions, personalization, and bystanders. Ultimately, we hope to advance the emergent integration paradigm through a body-centric design perspective.

Text selection relying on adjustment handles is a frequently used method on touchscreen mobile devices. However, this method suffers from limitations such as slow and unconformable interactions when dragging handles and being inadequate to select non-adjacent text for editing together. To address these limitations, this study proposes Text Pin, a novel technique that specifies the two ends of intended text by finger tapping rather than finger dragging. We designed mode-augmented handles to enable such operation. Experimental results show Text Pin was faster than default handle-based techniques on Android while maintaining comparable selection accuracy.

Ingestible sensors are pill-like sensors that people swallow mainly for medical purposes. We propose that ingestible sensors also offer unique opportunities to facilitate intriguing bodily experiences in a playful manner. To explore this, we present "HeatCraft", a two-player system that translates the user's body temperature measured by an ingestible sensor to localized thermal stimuli delivered through a waist belt equipped with heating pads. We conducted a study with 16 participants. The study revealed three design themes (Integration of body and technology, Integration of internal body and outside world, and Integration of play and life) along with some open challenges. In summary, this work contributes knowledge to the future design of playful experiences with ingestible sensors.

The advancement of sensor technology has provided new opportunities for bodily play and consequently enriched our bodily experiences. The emergence of ingestible sensors supports capturing the user's body data continuously. The intimacy between ingestible sensors and human body also shapes our bodily experiences. My research focuses on utilizing ingestible sensors to facilitate playful and engaging experiences in HCI using a Research through Design approach. This will lead to the development of ingestible interfaces, which allow the creation of novel and playful experiences. My work so far has explored the playful experiences that can be designed without crafting the relationships between the user's body and ingestible sensors. This research will contribute to the understanding of how to design playful experiences around ingestible sensors and ultimately inspire designers to create a wider range of future play experiences.

Ingestible sensors, such as capsule endoscopy and medication monitoring pills, are becoming increasingly popular in the medical domain, yet few studies have considered what experiences may be designed around ingestible sensors. We believe such sensors may create novel bodily experiences for players when it comes to digital games. To explore the potential of ingestible sensors for game designers, we designed a two-player game - the "Guts Game" - where the players play against each other by completing a variety of tasks. Each task requires the players to change their own body temperature measured by an ingestible sensor. Through a study of the Guts Game (N=14) that interviewed players about their experience, we derived four design themes: 1) Bodily Awareness, 2) Human-Computer Integration, 3) Agency, and 4) Uncomfortableness. We used the four themes to articulate a set of design strategies that designers can consider when aiming to develop engaging ingestible games.

Ingestible sensors are digital devices that can measure the user's body data after being swallowed and hence have great potential in medical use. Unfortunately, few studies have considered the playful experiences afforded by ingestible sensors. We believe that the use of localised sensations, such as those created by heat, to represent the data measured by ingestible sensors offers opportunities to support experiencing the body as play. To explore this opportunity, we introduce a two-player system called HeatCraft that uses an ingestible sensor to measure the users' body temperature and employs thermal stimuli to provide feedback. Similar to open-ended games, HeatCraft allows players to decide when and what to do in order to know more about their body, facilitating playful experiences of exploration and discovery. With this work, we aim to inspire game designers and HCI researchers to consider localised sensations when designing playful and engaging experiences around ingestible sensors.

We present the "Guts Game", a novel two-player mobile game involving ingestible devices. Our game requires the players to swallow a digital sensor that measures the user's body temperature continuously. Players need to change their body temperature to a certain degree to complete ingame tasks. Points are awarded to players upon completing these tasks. The game ends when one of the players excretes the sensor. The player who received more points at the end of the game wins. By introducing ingestible devices to the field of game design, we might be able to facilitate entertainment experiences for people who need to use ingestible devices for medical use. Furthermore, our work might also help game designers interested in developing novel and rich game experiences.

Interactive devices are increasingly used inside human bodies, such as pace makers and wireless pills. This trend has led to novel experiences with ingestible devices in the field of human-computer interaction on novel experiences people have with ingestible devices. We believe there is a missed opportunity to facilitate innovative game experiences using such devices. However, there is a lack of understanding on how to design games around ingestible devices. Therefore, this research investigates the design of ingestible games by using a wireless pill that can measure the user's core body temperature. We designed a game called "Guts Game". By investigating the game experience, we aim to gain an understanding towards ingestible game design and build a theoretical design framework around it. This research will contribute to a better understanding of ingestible game design and ultimately help designers to create a wider range of future play experiences.

Guts Game is a two-player mobile game that uses ingestible sensors to capture players' gut temperature as core game mechanic. It involves changing one's gut temperature to outscore an opponent and to win a race. Unlike most games that are controlled via external controllers, Guts Game makes a novel contribution by using an ingestible sensor, in the form of a pill, with which the players control the game by varying their gut temperature. This can occur either through food intake of different temperatures, exercising or changing environmental conditions. With the Guts Game, we show that the usage of gut temperature as a game input is feasible and demonstrate that experiencing your body as play, via an ingestible sensor, can be a mesmerizing play experience.