Recently discovered this cleverly lovely ad for Colgate by Y&R Thailand. Colgate had found that sampling toothpaste to children wasn't all that effective. So the brand decided to give away samples of something children would be guaranteed to lap up - lollies, ice cream and candy floss instead. Once the sweets are eaten up, the stick carrying them is revealed to be toothbrush-shaped with a secret message: "Don't Forget" and the Colgate logo.
I really like the use of packaging to carry the advertising message and the element of surprise and reveal to make a boring health message appeal to children.