Print out a picture that's slightly bigger that your cash notes. I photocopied a 20 pound note, scaled it bigger and then printed it out, but you can use any picture you like.
Cut out two rectangles of clear vinyl that are slightly bigger than your picture
Cut out another rectangle that is wider, but shorter than the other rectangles. Cut out another rectangle that is half the width of the first and much shorter. Pin the short rectangle to the bottom on the right hand side of the bigger rectangle.
Sew down the middle side of the short rectangle.
Place the picture in between the two larger rectangles and then pin the smaller rectangles on top.
Sew right around the area of the photo so that all the rectangles are secured together.
Cut off the excess vinyl and then it's ready to fill with money.