Because toddlers sleep so much, they cycle through more periods of REM sleep than adults, so they are likely dreaming frequently even if they do not always remember their dreams, reports Romper.

“There is truly no limit to the thematic content of dream activity with the exception of what a toddler has been exposed to,” Dr. Daniel S. Lewin, Ph.D., D.ABSM, CBSM, associate director of Sleep Medicine at Children’s National Hospital, tells Romper. “Dreams are critical for consolidation of learning and memory and working through both every day and complex daytime emotional and mental challenges.”