Toddlers almost certainly experience some form of mental activity during sleep, but their dreams look nothing like yours. Rather than vivid stories with characters and plotlines, the dreams of children under five tend to be brief, static snapshots, often featuring animals or single objects with little action or emotion. The question of whether this counts as “real” dreaming is one scientists still actively debate.
What Science Actually Knows
The honest answer is that no one can say with certainty what a toddler experiences during sleep. Researchers can’t ask a one-year-old to describe a dream, and brain scans alone don’t reveal subjective experience. What we do know is that toddlers spend a significant amount of time in REM sleep, the sleep stage most closely linked to dreaming in adults. Toddlers get roughly 20% to 25% of their total sleep in REM, which is comparable to adult proportions but spread across much more total sleep time.
REM sleep appears very early in development. The neurons responsible for the rapid eye movements that define this sleep stage begin developing before birth. Some scientists have taken this as evidence that dreaming begins in infancy. Others push back hard on that conclusion, pointing out that infant REM sleep looks quite different from adult REM sleep on brain wave recordings and in behavioral patterns. The presence of REM sleep alone doesn’t prove dreaming is happening.
What Toddler Dreams Likely Look Like
The most influential research on children’s dreams comes from psychologist David Foulkes, who conducted laboratory studies waking children during REM sleep and asking them what they’d just experienced. His findings were surprising to many parents: preschoolers’ REM sleep dreams usually consist of isolated, static images, often of animals. There’s no storyline, no action, and the child themselves rarely appears as a character in the dream.
Dream content between ages two and five shows a general absence of people, objects, and events. Think of it less like watching a movie and more like looking at a single photograph. Children at this age also have very low dream recall rates, meaning they frequently report nothing at all when woken from REM sleep.
This lines up with what researchers understand about cognitive development. Dreaming requires many of the same brain abilities as waking imagination: spatial reasoning, the capacity to build mental images, and enough self-awareness to place yourself inside a scene. Toddlers are still developing all of these skills. The brain region most critical for dreaming in adults, located where the temporal, parietal, and occipital lobes meet, supports the kind of complex mental imagery that toddlers haven’t yet mastered.
When “Real” Dreaming Begins
Dreaming as most people understand it, with active stories where the dreamer plays a role, doesn’t appear until surprisingly late. Around age seven, children start to represent themselves in their dreams, with more emotional content, active participation, and narrative structure. Dreams at this age become more frequent and longer. Full, adult-style dreaming with rich plotlines and consistent self-awareness develops between ages seven and nine.
Between five and seven, children produce longer dream reports, but recall rates remain low. Before age three, collecting any reliable dream report is essentially impossible, partly because toddlers lack the language skills to describe internal experiences, and partly because of infantile amnesia, the well-documented inability of very young children to form and retrieve the kind of memories that would let them recount a dream after waking.
This creates a real problem for researchers. When a toddler tells you they had a dream about a dog, Foulkes argued that what the child describes is almost certainly a waking fantasy or confabulation rather than a true memory of sleep-time experience. Parents naturally want to believe their child is recounting a dream, and toddlers are happy to oblige with a story, but the evidence suggests these accounts aren’t reliable reflections of what happened during sleep.
Why Toddlers Have So Much REM Sleep
If toddlers aren’t dreaming in a meaningful way, why do they spend so much time in REM sleep? The answer appears to be brain construction. REM sleep in early life serves as a kind of internal stimulation system for a brain that doesn’t yet get much input from the outside world. During REM, ascending signals from the brainstem promote neuronal differentiation, the formation and pruning of synaptic connections, and myelination, the process of insulating nerve fibers so signals travel faster.
Animal studies reinforce this picture. When infant rats are deprived of REM sleep for even a few hours per day, it destabilizes their hippocampal circuits and interferes with the maturation of components involved in memory consolidation. The abundance of REM sleep in early life and its steady decline into adulthood strongly suggest it plays a foundational role in brain development, independent of whether any dreaming is occurring.
In other words, your toddler’s brain is doing critically important work during REM sleep, even if that work doesn’t produce the kind of vivid dream experiences you have.
Nightmares vs. Night Terrors
If your toddler wakes up screaming at night, the natural assumption is a bad dream. But there are two very different things that could be happening, and they call for opposite responses.
Nightmares occur during REM sleep and are most common in the early morning hours, when REM periods are longest. A child who has a nightmare wakes up, can be comforted, and may be able to tell you (in simple terms) that something scared them. They’re aware of you and responsive, even if upset. The best response is straightforward: comfort and cuddle your child, and during the daytime, help them talk about what frightened them. Limiting exposure to scary TV shows or movies can reduce nightmare frequency.
Night terrors are fundamentally different. They happen during deep non-REM sleep, typically in the first half of the night. Your child may scream, sweat, breathe rapidly, and appear terrified, but they’re not fully awake and won’t recognize you. They’ll have no memory of the episode the next morning. The most important thing to know is that you should not try to wake your child during a night terror. Shaking or shouting will only make things worse. Instead, stay nearby, gently guide them back to bed if they’re moving around, and protect them from injury. Night terrors look alarming but are not harmful, and children outgrow them.
Keeping a consistent bedtime and making sure your toddler gets enough total sleep, including daytime naps, reduces the likelihood of both nightmares and night terrors.
What Parents Can Take Away
Your toddler’s brain is extraordinarily active during sleep, building the neural architecture that will support thinking, memory, and imagination for the rest of their life. Some rudimentary dream-like experiences, brief flashes of imagery without narrative, likely do occur. But the rich, story-driven dreams you experience are a product of cognitive abilities your child is still years away from developing. The sleeping toddler brain is less like a movie theater and more like a construction site.