Air Freshener Beads (tiny lenses)

I was in my friends room the other day and she has this air freshener. It is a container filled with a bunch of small gel beads. She had it sitting in the window and when I looked at it I could see the sun glistening off of each little ball. I was amazed by the fact that each ball shined the light in just a slightly different way than all or the others and how some reflected more while others let the light pass through and projected a little bit of coloring. Also in some of the pictures it you look at the ones on the edge you can see how they act as a lens, the image is flipped upside down so the window seal is at the top of the bead with the screen appearing bellow it. Except instead of magnifying the image from the other side it reduces the size so the window seal appears smaller when you see it through the bead than it does when you see it directly.