Read the following context and answer the question.
Context: He closed his eyes , turning away and gently pushing Hisa back into the hotel room . Tears still falling freely , he packed their bags and called the front desk , telling them he was checking out . Once he 'd packed Hisa 's little pink backpack and his duffle bag , he double checked the room and they walked out , locking the door and going by the office , dropping the key off .
Question: Why Hisa could not pack her backpack herself ?
Answer:


She is a child and she could forgot something .