The back of the cards mimic traditional playing cards with a tessellated logo. Orange was the representative colour of the brand, and so fit the attitude of the cards.
Variaiotns of the cards were made, each testing the layout of the content and the usage of the QR code. How small can a code get before it is unreadable? Can it be in orange on a white background?
Scanning the QR codes with Google Goggles resulted in perfect results.
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Bike Quote Cards

While working on the YO bike light brand, I developed some cards for handing out while at trade shows or marketing events.

Each card has a quote on that has been "biked." People with smart phones can scan the QR code to view the original quote and who said it.