Here is a quick question, if ever your baby swallows a foreign object like a penny, how will you retrieve it? Scared?
The Kolkatta police have their own technique for such disasters. Some poor guy stole a gold chain from a woman and galloped it. The police gave the petty thief a nice meal of bananas, chicken etc for an biological ejection of the chain.

Ain't it intelligent?
On BBC News: http://news.bbc.co.uk/2/hi/south_asia/6932216.stm