The 3-year-old is full of wonder and spends a lot of time watching, observing, and imitating. Their days are filled with busy exploration of their world.
Three-year-olds are interested in perfecting motor skills, and it is common for them to spend the entire morning going down the slide or riding a favorite tricycle.
Three-year-olds have very little memory for past events and do not understand "yesterday" and "tomorrow" the way adults do. They often repeat activities or may do and undo actions such as putting a puzzle together. These sequences are important to later understandings of change and consistency.