In the world today, it remains that some individuals experience challenges with or are not able to use locks available on the market due to barriers related to accessibility. The goal of this study was to understand the characteristics of and design opportunities related to an accessible lock and two research questions were examined: 1) how do people who have insight into the challenges related to using locks respond to using current locks available for schools, home or in day- to-day environments?, and 2) what kinds of new locks could be (re)designed to support broader and more diverse audiences? Four co-designers took part in this study; three adults and one child. The findings from the co-design sessions were grouped into 11 themes and two prototypes (initial designs) were created during the study, including a lock (Thomas) and locker (Tim/Luke). The features of the prototypes were discussed in three sections including: 1) customization, 2) digital buddies, and 3) self-powered technology and trust. Customization was seen as playing five roles including: 1) as a means through which one can make decisions (or choices) about the device and how one interacts with it, 2) as a method of providing multiple points of entry (access) for people of all ages and abilities, 3) as a means of differentiation one individual’s locker from another, 4) as a way to specify and personalize security, and 5) as a means to select aesthetic preferences. The concept of digital buddies was discussed with respect to how the “buddy system” (CA) fosters the interdependent connection between individuals and their devices. Lastly, self-powered technology was seen as being a way to promote trust in the individuals who are using the device.