Found this hidden behind a cabinet in our new home. What is it used for?

The family painstakingly pieced together the stories embedded in their home’s fabric via extensive study and conversations with neighbors. The treasures from the box revealed stories of joy, sorrow, and love, deepening their respect for the home’s history.
In an effort to honor and preserve the memories of the house’s previous inhabitants, they decided to save these artifacts and compile a scrapbook. Their lives were filled with a deep feeling of belonging and permanence, and they were also bound to the lineage of their new home by this fortunate discovery.