What is that black stuff????

So morning before last Thomas woke up with a bunch of black flecks all over his face...At first Travis and I were both horrified thinking he had somehow got his hand in his diaper and then...well you can guess... Anyway, we were relieved albeit bewildered to find out that Thomas had chewed the paint right off of his crib!!! Right on the side you can see an area that he chewed right through the paint down to the wood. Who knew our little baby could turn into a beaver over night!!