Story Focus - One Piece of the Puzzle

I have a puzzle that I show teachers and students of penguins doing about 30 or 40 things in the picture. Each one is isolated from the others, and all seem like interesting and fun activities.
I ask my audience to look carefully at the entire puzzle and decide which is the most original and unique activity in their opinion.....the one they would enjoy doing the most. Then I have them write a story, pretending that they were the ones doing the events, in place of the penguins.
They end up writing pretty focused papers about one piece of the puzzle instead of every little part. I show them that this strategy can be used in their own writing to make the papers more manageable.