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In this work, we present three experiences developed with 3D printing technology for teaching in Optics. These activities were planned, designed, and implemented to go deeper into knowledge about light polarization, reflection and refraction phenomena, and colour perception. The planning methodology is also detailed, in particular, the design and description of the activity. Experimental guides, 3D models and assembly manuals are available in a free and freely accessible web space. In summary, we demonstrate that the 3D printing can be used as a technological, inclusive and pedagogical resource for teaching. This methodology can be extended and adapted to other disciplines, as well as applied locally in educational institutions.