Personalised Postcard Printer
A machine similar to a photo printer at photo printing shops. Photos can be transferred to the machine via usb, dropbox, etc. They can then be manipulated to make postcards, which it then prints out on postcard paper, with or without lines on the back. Could also incorporate puzzle postcards and prepaid postage.
These machines can be purchased by cafes for their customers who want to send personalised postcards. At the same time they can order a coffee or something to eat.
Reward: One machine to keep for myself and another to give to a local cafe in Helsinki.