My play observation took place at Mill 180 Park in Easthampton, Massachusetts on February 17, 2018 between the hours of 12:15 p.m. to 1:30 p.m. This is an indoor urban hydroponic park where children can enjoy a variety of different games, food, and an open play area to interact with others. While I was at the park, I observed two school-aged Caucasians engaging in unstructured play. The children were siblings, with the boy being ten years old and his sister eight years old. When I first observed these children, they were not interacting with one another. The boy was building a structure with the foam blocks, while the girl was sitting on them, rocking back and forth. However, halfway through my observation, the children were building on a structure together, followed by helping another child build a structure afterwards. They also chased each other around and raced each other in an obstacle course….seeee what everyonnne wrote ….adddd (decreibe type of play asss it evolved over time))))) The type of play model that was appropriate for this given age group was Jean Piaget’s theory of cognitive development. This model is broken down into four stages: sensorimotor, preoperational, concrete operational, and formal operational. The children that I observed were in the concrete operational stage. Cole and Tufano (2008) explains the concrete operational stage as, “Intelligence is acquired through systematic manipulation of concrete objects, resulting in seven types of conservation