Undergraduate Thesis, The Sum of the Things We Leave Behind is an interactive mixed reality installation featuring an abandoned dinner table about the evolving relationship between two siblings. Using forgotten objects to represent pivotal moments in their lives, the installation celebrates the versions of ourselves we abandon to shape who we are today. Drawing from research on enhancing museum engagement through interactivity, the project uses interactive artifacts to evoke emotion to cultivate a deeper understanding of the past. Visitors will engage with the installation by uncovering hidden messages to unlock recordings of the past.