The 10 strangest things that have been used as money

I read this story today online and thought it would be brilliant to share with students. It would create some cool discussions around what money is and how, if people are willing to trade, currencies can be created.I love the bottle caps in Cameroon. Have a read and see what you think - http://www.stuff.co.nz/travel/news/79181857/the-10-strangest-things-that-have-been-used-as-money-around-the-world