Having been a preschool/kindergarten teacher for 11+ years, I can spend a WHOLE day telling you about things children have swallowed (and they usually pass through the body naturally
) or stuck up their noses.
My favorite is when a little boy stuck a piece of chalk up his nose. It was REALLY stuck, so we ended up calling the fire department and they came and pulled it out. When I asked him why in the world he stuck chalk up his nose he responded, "I was doing a science experiment!"