Create a collage that encapsulates the concept of 'Sister'. Use visual elements that are influenced by Art Deco, a prevalent style in the 1920s and 1930s, known for its rich colours, bold geometry, and intricate details. The collage should contain items that are associated with sisterhood such as siblings, familial bonds and shared moments. Keep in mind the sharp lines, lavish decoration, and emphasis on modernity and progress that define Art Deco.