Nicely done! (I don't know why the audio blinks out at 20 seconds, but that's not important.) The technique is called "tilt-shift," and it's a way of tricking the eye to perceive real-life objects as if they were miniature models. The primary visual cue is focus, or depth of field. Think of it like this: if you look at a bunch of stuff on your desk, objects that are 2, 3 and 4 feet away from you are at different focal lengths. If you focus on one, the others are blurry. On the other hand, if you look at a bunch of stuff down the block, objects that are 1002, 1003, and 1004 feet away from you are all at virtually the same focal length and appear equally sharp.
So what you do is take a photo in which everything is at about the same focal length--overhead shots of large vistas work best--and progressively blur the bottom and top (that is, the nearest and farthest distances in the photo) to simulate being out of focus. I fake it in Photoshop, but you can also use a specialized camera lens to shoot tilt-shift photos in real time. It helps sell the illusion if you jack up the contrast until everything has a saturated, plastic sheen. The Allstate commercial goes further by making the action jerky, like stop-motion animation.
Here are some before-and-after photos I did back in October 2006 when I tried the technique. Some work better than others. I haven't played with it since, but would like to. Sometimes the results are pretty startling.
Here are a couple more. Again, some are better than others.
What I like about the tilt-shift technique is what it reveals about how we perceive, the cues we use to judge relationships and distance, and how amazing the brain is at putting it all together. Also how easily and subtly the brain can be fooled. It's pretty incredible when you think about it.