What happens if I swallow this?

When I was little, I had a fear of swallowing things I hadn't even touched, let alone put in my mouth. It was somewhat amusing then, when Izzi poked me while I was laying on the couch with her watching a show about the Lincoln Assassination (I was NOT sleeping. Not even a little bit) and she was writing a letter to her friend. She pokes me and says "what happens if you swallow this?" and points to the obviously recently chewed off eraser on her sparkly Hello Kitty pencil. "Nothing" I replied. It hadn't sunk in yet. She says "are you sure?" Then I realized...I asked her if she swallowed her eraser, and she shook her head vigorously and said no repeatedly. I told her not to worry, little girls that didn't eat erasers eventually pooped them out. She looked relieved.