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This paper presents a long-term field study of the coMorphing stool: a computational thing that can change shape in response to the surrounding light. We deployed 5 coMorphing stools to 5 participants' homes over 9 months. As co-speculators, the participants reflected on their mediated relations with the coMorphing stool. Findings suggest that they perceived the subtle transformations of the coMorphing stool in the early days of the deployment. After becoming familiar with these features, they interpreted their daily entanglements with the coMorphing stool in diverse personalized ways. Over time, the co-speculators accepted the coMorphing stool as part of their homes. These findings contribute new empirical insights to the shape-changing research field in HCI and enrich discussions on higher-level concepts in postphenomenology. Reflecting on these experiences promotes further HCI explorations on computational things.