Since the back plate is transparent, you can insert not only paper puzzles but also "art crystal jigsaws (transparent puzzles)".
Set contents:
Frame: 1 piece
Transparent cover: 1 piece
Transparent tray: 1 piece
Wall hanging parts: 4 pieces
Hanging string: 1 piece
Corresponding puzzles:
38 x 53 cm.
Paper pieces, transparent pieces
JPY 
Euros
British Pounds
Australia Dollars
US Dollars
Canada Dollars
Chinese Yuan
Singapore Dollar
Hong Kong Dollar
