A likely experience many young children have because of the immaturity of the amygdala is frightening nightmares.
The amygdala is a part of our brains that is in charge of handling emotional processes, including stimuli related to fear. Since the amygdala is immature in children, it is likely that many of them will experience frightening nightmares as a consequence.
With the information above in mind, "frightening nightmares" is the best way to answer the question.
Learn more about the amygdala here:
https://brainly.com/question/26504011