I worked on this modular controller throughout my sophomore year as part of Project Tadpole. I led a group of three through the engineering design process, from brainstorming to iterative prototyping. This project built on the existing work Project Tadpole does with toy modification, where we rewire electronic toys to use more easily accessible buttons. Traditional toy controllers often have small, tightly packed buttons and joysticks that can be difficult to use for children with motor-controlled disabilities or limited dexterity. My group set out to create a more accessible, 3D-printed modular toy controller that could be used to modify a range of toy controllers. We ended up creating a system consisting of a stand-alone triangular button that slides into a larger housing for all of the buttons and circuitry. I designed the triangular button and collaborated with other students on the housing. At the end of the year, we presented our work at Duke’s Accessibility Expo and had a prototype that was able to control a toy robot. The project had many iterations and involved testing with other club members and an occupational therapist to inform design decisions throughout the process. I found this project, along with all of my work with Project Tadpole, to be very rewarding as the work that my team accomplished will help improve children' s lives. I improved both my Solidworks and Onshape skills and learned more about the inner workings and electronics of remote-controlled toys. I also had a great experience working with a team and being a leader.