Department of PsychologyDepartment of Media and Visual Arts2024-11-092022978145039197910.1145/3501712.35340912-s2.0-85134194619https://hdl.handle.net/20.500.14288/3357Magnitude understanding, an understudied topic in Child-Computer Interaction, entails making nonsymbolic ?more-less comparisons that influence young children's later math and academic achievements. To support this ability, designing tangible user interfaces (TUIs) demands considering many facets, ranging from elements within the physical world to the digital design components. This multifaceted activity brings many design decisions often not reflected in research. Therefore, we present this reflection via our research through design process in developing a vital design element, the physical form. We share our (i) physical object design criteria elicitation for magnitude understanding, (ii) hands-on making process, and (iii) preliminary studies with children engaging with objects. With our insights obtained through these steps, we project how this physical object-initiated research inspires the TUI in the upcoming steps and present design takeaways for CCI researchers.pdfEducationTabletopMulti-touchConference proceedinghttps://doi.org/10.1145/3501712.3534091N/ANOIR03769