Cracked and Crumbling

My son broke his iPad screen.  It was bound to happen, and for the amount he wanders around with it, I'm surprised it hasn't happened before.  What he's been doing though has been worrying me:  he's still using it.  I was hoping the cracks would start to bother him, especially if the glass started to shed sharp little fragments.   A natural consequence of sorts. 

It did not bother my son, who has continued to use the iPad.  Tonight I noticed it was in much worse shape than I had thought.  I've taken it away.  He'll have to pay for the screen to be replaced.   He knows this.  I think we're going to have him pay for a case as well.