What I did was run the ppt, have the kids guess. After the ppt was done we would talk about their favorite currencies and then I would pose the question. If you could create your own money, what would it look like?
I went through bank note images and used an american dollar bill and blanked out the amount, face, and country. Printed that off and had the students make their own.
My students really enjoyed it.
Another tip : make your own fake money for class. You can use the money the students made or print off your home currency. It come in very handy when you are playing auction games or any team buying games. I make bundles of 300, 000 won and that usually lasts the group for the games we play.