I love any element of surprise when it comes to planning events and what better way to set the mood of the party than with a boxed invitation. Jordan Ferney, author and letterpress design extraordinaire from Oh Happy Day! , designed a boxed invitation for a baby shower. The sweet surprise was the Lemonhead candies at the bottom of the box.
This idea can be incorporated into any kind of event. Even if it isn't a box, any 3-d element on an invitation excites the recipients and ensures a great first impression.