Whodunit

Donny called me to his room and he was quite disturbed.  He was standing next to his Lego table with his hand on his hip and shaking his head back and forth. "Mommy!  Somebody put a booger on my Lego!  That's disgusting!"  I couldn't believe he actually thought someone came into his room and placed a booger on his Lego wheel and it couldn't possibly be his booger.  I had to leave the room before I laughed in front of him.