In class this week, we experimented with layers and marquee and selection tools. The picture below shows the layers used in this process.
The original picture was edited by removing and replacing with other pictures. The light blue sky background was selected using magic wand tool, removed and replaced with a galaxy-like background. A spot of grass was also selected using magic wand tool, removed and replaced with a hole-like background. The additional images were added as layers at the back of the original picture.
The following are additional versions of the edited image using image adjustments.
Original version: 
Flipped version (horizontal):
Inverted version:
Posterized version: 