Lego

 

I also found this ad in Communication Arts Advertising Annual.  The little Lego blocks stood out to me because I grew up with Lego and it brought back memories.   Lego is very well known, so I think it was a successful way of getting an instant reaction from the audience.  

I was also curious by the four sectioned composition.  I like how they made an entire story about one single Lego cube.  It makes you excited to think of how much fun you could have with a whole bucket of Lego.  It captures the spirit of imagination quite well, and even leaves a space for you to create your own story, making it an interactive image.  Overall, quite nice and surprisingly more complex than it initially seemed.