The <em>pre-operative phase is the second phase in the cognitive development theory of Piaget.</em> This phase starts around 2 years of age when kids begin talking and lasts until about 7 years of age.
Children <em>start engaging in symbolic play during this phase and learn to control symbols. Piaget observed, however, that concrete logic is not yet understood.</em>
a whistle blower. A whistle blower is a person who informs on a person or organization engaged in an illicit activity. which is the definition you have described.
