Use the following writing prompt to inspire you.
You and your family rent a cabin deep in the mountains to get away from it all for a few weeks before school begins. The first day passes without any issues, and the entire family falls asleep quickly that night. When you wake up in the morning, you find bread crumbs on the kitchen counter. You accuse your children of eating a midnight snack, but they insist they did not get up at all, even to use the bathroom. The next morning, you awake to find your hiking boots missing. The morning after that, the blankets from your bed are gone, and you never felt a thing. What is going on?