These little animations are easy and quick to make. I use my iphone and have it positioned so that it won't move or fall over. Take a photo then move the object along, take another photo etc. The New York street scene above it 5 separate photos. Then using an online gif maker such as www.picasion.com or www.gifninja.com I turn it into an animation.
If you like these I am guessing you will LOVE this. Look at the very subtle movement in this image. This is the work of Jamie Beck and Kevin Burg of Cinemagraph. Check out the other awesome clips at their website.