Pretend play includes symbolic use of objects. Once an object has been given an "identity" (for example, a block is a cell phone), children keep that object’s identity the same until they are finished with that particular game. Children at play work from cognitive models that link situations and emotions, and by age 2 to 3 can conjure up a setting with characters and circumstances that will then trigger a set of beliefs, emotions, and actions that the child would normally associate with that situation.