Pretend play is elaborate and creative — multi-scene narratives with imaginary friends and creative use of objects. According to Zero to Three, this reflects advanced planning, sequencing, role-taking, and symbolic representation. They understand abstract concepts with more nuance: "yesterday," "tomorrow," "same," "different." The "why" phase has begun — each question is a learning opportunity.
Feelings are big and immediate. The ability to name emotions — "I'm mad," "I'm scared" — is developing and is a crucial skill. Empathy is more nuanced: they might ask "are you sad?" and try different strategies to help. They have a sense of humor, early friendships, and handle separations better than before.
Vocabulary is 200–500+ words with 3–5 word sentences that have basic grammar. They can have real, multi-turn conversations. They narrate everything: "I'm going up the stairs." Strangers understand about 50–75%. They count (sort of) and understand "more" and "less."