I used to leave a window open at night because Bubbles likes to run around outside. However recently he got into fights with several stray cats that also like to run around at night. So I've decided that he has to come inside when I go to bed, around 1am. At this time he is still full of energy and will do anyting to get me to play with him. Here he crawled underneath the blanket and is waiting in anticipation for me to supply something for him to attack.