I really liked how this photo turned out with the different opacities and the different positions of her sledding down the hill. Using the selection tools and layer masks was a little challenging at first, but after a few times, it was quite easy.
For this photo, I stood in the same place while someone moved a tennis ball down the wall so that when I mashed all the original photos into one, it looks like the same ball is rolling down the wall. Again, I used the picture when the ball was closest to me as the background photo, then used selection tools and layer masks to select the tennis ball in the other photos and drag it into the background photo. Then I used resized the tennis balls, changed the opacity to add some interest/emphasis and then enhanced the photo with basic editing tools.I was also really happy with how this photo turned out, especially the way the tennis balls look like they are rolling down the hill and also how the colors of the wall and balls stands out so much against the white snow. I was surprised at how simple this was to make once I got the hang of it.