This example of photomontage is interesting because it combines a mountain range with a vintage photo of a little boy with whipped cream. It is a light hearted image and pairs well with the light nature of the whipped cream.
These are a series of collage/illustrations by Argentinian artist/graphic designer Laura Guarie. I find a lot of inspiration from the combination of the female heads and the thin sharp geometric lines.
Self portrait ideas Mapping 2013 on Behance Use a process like this for "identity/self-concept" activity about skin color/shade/tone/palette. Put vertical photo strip of every child together on a couple images to make a collective face.