StrutModeling: A Low-Fidelity Construction Kit to Iteratively Model, Test, and Adapt 3D Objects We present StrutModeling, a computationally enhanced construction kit that enables users without a 3D modeling background to prototype 3D models by assembling struts and hub primitives in physical space. Physical 3D models are immediately captured in software and result in readily available models for 3D printing. Given the concrete physical format of StrutModels, modeled objects can be tested and fine-tuned in the presence of existing objects and specific needs of users. StrutModeling avoids puzzling with pieces by contributing an adjustable strut and universal hub design. Struts can be adjusted in length and snap to magnetic hubs in any configuration. As such, arbitrarily complex models can be modeled, tested, and adjusted during the design phase. In addition, the embedded sensing capabilities allow struts to be used as measuring devices for lengths and angles and tune physical mesh models according to existing physical objects.