Personal data and digital technologies increasingly shape children's daily experiences, but younger children are seldom presented with opportunities to reflect in-depth about their perspectives on personal data, beyond simple warnings about not sharing information online. We present Grasping Data, a set of portable activities aimed at helping children explore what counts as personal data, why some data feel more personal than others, and how meaning changes between audiences and purposes. The demo combines three linked tangible activities: a teddy-bear proxy for card sorting-based discussion, a wooden tangible prototype for self-generated activity data, and a set of shape-changing multi-material objects for embodied interpretation of personal data. For the IDC community, the demo contributes a 10-minute encounter highlighting concrete, research-based, low-tech methods to discuss personal data with young children across formal and informal learning settings.

Data physicalization is a promising approach for empowering children to understand and enjoy their own data. However, it relies on embodied metaphors to convey information effectively. This paper explores how to elicit children’s embodied experiences using a set of shape-changing objects that can inform the design of dynamic physicalizations. We propose a set of auxetic metamaterials, which can bend, twist, scale and shear. Following principles of tangible interaction, we conducted a study with 59 children who participated in four movement-based games before being introduced to the collection of shape-changing tangibles. Children expressed metaphors based on these activities related to concepts such as containers, rhythm, resistance, and semantic analogies, which we categorised into embodied schemas. Our findings reveal that characteristics of the shape-changing tangibles aid children in connecting their bodily experiences to dynamic transformations. Translating these insights into idea sketches, we outline how to tailor these affordable shape-changing mechanisms into usable prototypes.

Unlike any previous generation, children's lives are now highly datafied, tracked, and digitally monitored.They are increasingly vulnerable to data collection from seemingly innocuous toys and devices with cameras, sensors, voice recognition, and geolocation.Yet, children typically lack awareness or control over these data exchanges, as consent is usually given by adult caregivers (who may also lack data literacy).Despite regulatory improvements, interdisciplinary approaches remain crucial to empowering children to understand, value, and manage their personal data.How can the IDC community involve children in the design and use of their personal data?This workshop unites experts to explore current practices.1 CCS Concepts• Security and privacy → Social aspects of security and privacy; • Human-centered computing → Interaction design 1 This workshop merged with "Towards a Research Agenda for Including Children and their Care Ecosystems in HCI" to run a joint workshop: Grasping Data Together: Interdisciplinary Agendas for Engaging Children and their Care Ecosystems with their personal data

Abstract This paper explores household preferences for visualizing consumption data and investigates the potential of data physicalizations to enhance user engagement and promote sustainable practices within households. We conducted semi-structured interviews with thirteen households, utilizing a combination of images and low-fidelity prototypes to gain insights into participants’ preferences, ideas and feedback on visualizing consumption information. We requested participants to discuss an object in their home that symbolizes sustainability. The results revealed different emotional responses, from empathy to repulsion, triggered by different visual representations. Our findings also identified certain physical objects and locations within the household that play a role in fostering family collaboration towards sustainable practices. Participants preferred having a physical representation of their consumption data within their homes over a screen-based display. In light of these findings, we open space to consider designing physicalizations that encourage collaboration, enhance user engagement and motivate households to reduce their consumption.

Although household consumption contributes to climate change, it can be challenging to comprehend the consequences and effects from a personal perspective. In this paper, we explore the design of physical data visualisations to promote sustainable practices within households. We conducted 15 household design workshops involving household members to explore physical designs and envision the potential use of physical artefacts in the home to promote sustainability behaviours using five low to medium-fidelity prototypes. The findings from these workshops highlight the need to balance aesthetics, abstraction, and the presentation of actionable information in the design of physical artefacts. Based on our findings, we identify key design considerations for future design: (1) including all household members in the design process to reflect the collective goals and values of the home, fostering a sense of ownership and engagement, (2) considering child-friendly design in physical artefacts to promote awareness, education, engagement, and sustainable values in children, (3) and considering nature-based visuals to reduce the mental burden of information overload.

Understanding household practices, beliefs, relationships among the members, and their preferences are often overlooked in the design of home-based interventions aiming to reduce consumption. We conducted a survey in the United Kingdom (22 responses) and a follow-up interview with 13 households to inform the design of interventions for reducing household consumption by: 1) understanding household consumption practices, and 2) identifying the concerns and challenges for household engagement with sustainability practices. Our findings highlight how the perspectives, understanding, and motives for consumption reduction actively shape household practices and their attempts to curtail consumption. Existing non-negotiable practices led to additional household consumption and we found different strategies households use to reach a shared-decision on food and energy use. Based on our findings, we provide opportunities for motivating and fostering engagement with sustainable practices at home.