There's a "Rarr" under my Bed

I think the girls have successfully scared Nathan into believing there's a "Rarr" (translation "Monster") under his bed. After a morning of playing in the boys' room (they typically play in the girls' room), nap time with Nathan was quite a battle. He insisted there was a "Rarr" under his bed -- and the only source of this sudden insistence that made sense was that the girls had said something about monsters while they were playing in his room. After repeatedly placing him back in his bed, I checked on him after he had been quiet for awhile and this is what I found.