AdaFruit Industries decided to create interesting business cards, one of which was a laser-cut plastic card with spirographs.
Spirographs are mathematical curves, so you may want to reserve these cards, which pop out into separate spirographs.
Those who really appreciate these nerdy business cards could have some mathematical fun while self-promoting.
Implications - Interactive business cards do more than just advertise a person's services; they also reinforce the individual's personal brand or corporate identity. Business cards with hands-on functionality are far less likely to be discarded or forgotten. Interactive business cards are particularly useful for showcasing service-oriented organizations' creativity, utility and resourcefulness -- a boon when competing for business in a recession-affected market.