This design-based research provides design considerations for developing educational tools for teaching programming to blind primary schoolers, as an effort towards more inclusive classrooms, given that the tools available today are not accessible to these students. Existing tools were analyzed and tested, and co-design practices were applied in exploring ‘instructions’ as a main logic operation for computer programming, through experimenting with diverse types of interfaces, having visually impaired participants at the center of the process. Physical and mental patterns, relevant for improving the accessibility of such tools, are unveiled and further discussed in this study.