Little People

I found a couple artists that worked with tiny figurines.

An artist named Slinkachu displays his art in the streets. He started in 2006 making this kind of art by incorporating his ideas to the surroundings where he was installing his work. He says that he makes these scenes to "reflect on the loneliness and melancholy of living in a big city".
http://slinkachu.com/little-people
Here are some examples:

This artist named Dan Abramson made the classic green soldier toys into Yoga Joes. He said the inspiration for this work is that he has seen other versions of the soldiers like Toy Boarders and plastic break dancing people.
http://www.thisiscolossal.com/
Here are some examples: