The second round is about the vocabulary of toddlers. Toddlers of 2 years old already have a big vocabulary but their language comprehension is still bigger than their language usage. They ask a lot of ‘what’ and ‘why’ questions. At the end of their third year of life they will make their first social interactions with their language to talk with peers or other grown ups. At the end of infancy, they will learn how to conjugate verbs correctly and use articles.