What goes through their minds?!?

Levi came to me crying this morning.  He was picking his nose.  I couldn't tell what the problem was, but he eventually started crying.  I began to suspect he had something stuck in his nose...  Eventually, he sneezed several times and this is what we "retrieved"...

In case you can't tell from the photo... it's the broken "hinge" from a cd case.  What goes through their minds when they do these things???  "Huh, I wonder what would happen if I shoved this tiny little thing up my nose??"  LOL

Just for the record, he's none the worse for the wear.  This photo was taken just moments after the final sneeze. :)