The silhouette of the girl fading into the forest is a great use of Photoshop. The message of the picture may not be clear to everyone, but the design is very well done. The contrast between black and white is always a nice aspect to incorporate.
Great display of Gestalt's principles having two images of a hand and what looks to be the bottom part of a lightbulb. The dominating figure is the hand. But with closer inspection, you can see a lightbulb being formed.
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.