Last semester work for my Communication Design 2 class. My professor asked us to redesign an existing paper currency or create one for a fictional world, so of course I made one for the Wizarding World! There are a bunch of security features in my design such as serial numbers, microtext, gradient colouring, and ornaments to help prevent counterfeiting.
The colour choices were taken from traditional Gryffindor colours where Dumbledore belonged to as a student. When you fold the bill, both sides connect to create the Deathly Hallows symbol.
To a muggle’s eyes this bill is static, but to wizards the smoke actually billows out from the train and Dumbledore waves at you and comes and goes as he pleases, just like in the Chocolate Frog cards.