Some people like suburbia for the wide open spaces, yards, and the sense of privacy, but the ‘burbs are not nearly as efficient as urban centers are. What if there was a way to bring all of the positive qualities of exurbia into the city while keeping all of the efficiency of an urban core?  What about stacking blocks of suburban space onto blocks of urban space, similar in theory to vertical farms, creating modular gardens, orchards, parks, playing fields...more.