Physical development slows down from the rapid growth during infancy. From age 2 through age 5, most children gain about 3 lb (1.5 kg) to 5 lb (2.5 kg) a year and grow about 3 in. (8 cm) a year.
Cognitive development, or thinking and reasoning skills, progresses from a simple to a more complex understanding of time, letters, counting, and colors. Children are able to follow increasingly more detailed commands.
Language develops rapidly between ages 2 and 5. By age 3, children can speak at least 200 words and can follow two-part directions, such as "Wash your face and put your shoes away." Most 5-year-olds can carry on a conversation.
Sensory and motor skills become more refined, from being able to walk up stairs, kick a ball, and draw simple strokes to being able to do basic tumbling and draw rough figures of people and other recognizable objects.