I see clearly now... The nutcracker you bought the other day is alive. And it has magical power of some sort. However, it did something with the house. It looks bigger now. Or maybe you became smaller? What's going on here? Wait, did you see them? Those plastic soldier figures are also alive! They just finally marched through the room. They were in a big hurry, though. Let's follow them and see what else happened here during the night.
Maybe, they will help you turn everything back to normal. Oh... The door is locked. They key must be here somewhere. Or you could just look for the hole where the soldiers went through. It all seems so strange but because nothing scares you, you followed them anyway. The soldiers are marching in front of a mouse hole. Raising their guns in unison and some posed on their knees, too. Finally, you just realized why this all seems so familiar.