This is the complete version of our interpretation of the sailboat “Lantcha”. The component labelled ‘A’ is the coupon dispenser. ‘A’ is systematically connected to ‘B’, which is a LED screen with a QR code scanning capability. When the Museum Visitors have answered all the questions, they use the QR code scanner on the screen to scan the QR code on their smartphones, and a coupon will be dispensed from the vending machine ‘A’.