Carter's Backache Plasters for every ache or pain : puzzle card.
The pattern
This still is filed under Keepable trade card.
Define
A small card people keep (pretty, useful, or collectible) that carries the brand after the encounter.
Mechanism
Retention object. The gift is the media. Recall is paid for by usefulness or delight, not by repetition.
Verdict
We can put a physical or digital keepable in someone's pocket and they will not throw it away.
Why it works
The puzzle format provides entertainment value, making it highly likely that the card will be taken home, shared, and kept for a long time, guaranteeing repeated exposure to the brand.
Steal this when
You want to maximize the retention and sharing of a physical marketing piece by adding interactive entertainment value.