For living in a sustainable future, “Becoming Plastic” invites audiences to consider alternative processing approaches such as circularity in construction. A common misconception is that there is only one kind of plastic, but there are actually three class systems that define the material: thermosets, thermoplastics, and elastomers. Waste thermoplastics, which are the most reclaimable plastic waste, are processed by cleaning, shredding, and heating collected material. This allows them to be 3D printed with extrusion or reshaped within a mold. The application of these processes results in the production of both goods and building materials; plastic containers, bottles, jugs, and bags are transformed into furniture, objects, works of art, and building components. These processes require scrutiny of material refinement and production, the prevention of additional material extraction, and the finitude of planetary resources. To create new models and methods of fabrication, we must become plastic in how we live with the material.