Well.. I usually inspect the crap out of my food before I eat it, but my sisters don't. They end up eating some pretty funny stuff.
You know those chocolate sport balls, with the aluminum foil? My sister was 3 or 4, and she didn't know that it had a wrapper. So she tried to eat it, wrapper and all. I remember her crying, saying she hated the candy, and I remember seeing the little pieces of aluminum foil in her mouth.
M cat took a dump on the floor once and my sister thought it was chocolate too. I'm sure you can imagine how that went.