Children become able to reason about other's pretend play:

Question

Quizplus · Accepted Answer

Children can reason about others' pretend play before they pass classic false-belief tasks. This ability to understand pretend play often develops earlier than the ability to pass false-belief tasks, which is a more complex form of understanding others' perspectives and beliefs. Pretend play involves recognizing that someone can act "as if" something is the case without believing it to be true, a simpler form of perspective-taking.

Children Become Able to Reason About Other's Pretend Play