Why does my kid… · Sleep

Why can’t my child fall asleep at night?

Kids can’t fall asleep when the body’s “on” signals stay louder than the “off” ones. Corti, the stress alarm, may still be ringing from a busy or worried day, Gabi (the brain’s brake) needs a quiet, predictable evening, and light or a shifting body clock can push sleepiness later. Calm, steady routines usually help most.

Updated Oct 26, 2026 · Little Brain Crew editorial team · How we write

Corti: rings the alarm when there’s danger

Say it to your kidCorti is the alarm that wakes your body up, and sometimes it keeps ringing at night when your head is full of thoughts. Gabi is the brake that turns the volume down. Let’s breathe slowly together, smell the flower, blow out the candle, and help Gabi find the brake.

What’s going on when a tired kid can’t drop off?

Falling asleep is the body’s switch from “on” to “off,” and it needs several things to line up. Sleep pressure has to be built up from the day. The body clock has to say it’s evening. The surroundings have to feel safe and quiet. And the alarm has to be low.

Corti is the alarm. Cortisol is a normal hormone that wakes the body in the morning and helps with challenges, and it’s not a villain. At bedtime, though, a body that is still on alert, from a hard day, a fight, a big test or a scary thought, finds it harder to power down. Gabi, the GABA character, is the brake that quiets signals so the body can settle. Evenings that are loud, rushed or full of screens make Gabi’s job harder.

Why do worries show up at night?

The day is full of noise: school, friends, chores. At night, there is nothing to cover it. A kid lying in the dark can notice what they pushed aside earlier, and small worries can feel enormous because Fronti, the planner, is tired. Younger kids may be afraid of the dark, of being alone, or of a nightmare. Older kids may replay a conversation or worry about a test.

One habit many families try (it’s a practical idea, not a studied method) is to give worries a slot earlier in the day. A short “worry time” after school or at dinner, where your child can say what’s on their mind, may leave bedtime less crowded. Slow breathing, practiced in the afternoon when it’s easy, becomes a tool they can use at 9 p.m.

What gets in the way?

Most sleep trouble at this age comes from a handful of everyday habits, and most of them are fixable:

Bright light and screens in the last hour before bed, which are linked to delayed melatonin.
A bedtime that moves around, so the body clock can’t predict when to feel sleepy.
Caffeine from soda, iced tea or energy drinks, which can keep a body awake for hours.
A phone or tablet in the bedroom, even when nobody is using it.
A long or late nap.
Lying awake in bed for a long time while upset, so the bed starts to feel like a place for worrying.
Not enough movement or daylight during the day.

What helps?

Think wind-down, not shut-down. In the last hour, switch to dim, warm light, quiet play and the same short sequence every night: bath, pajamas, book, lights out. Predictability tells Corti it can stand down. Devices charge outside the bedroom, for everyone.

If your child is awake, keep your response calm, brief and boring. A long chat, a snack party or a stern talk can wake both of you up. Short and kind works: “I’m here. It’s sleep time. I’ll check on you in five minutes.” Then leave the detective work for tomorrow: was there a late screen, a worry, a missed workout, a shifting bedtime?

What changes by age?

Ages 3–6: Fear of the dark, separation and big imaginations are normal. A night-light, a stuffed friend and a predictable routine help. Check-ins that get shorter each time can reassure without turning into a game.

Ages 7–12: Worries and busy minds are more common. The three-breaths habit and a short journal or “brain dump” before pajamas can lighten the load. School-age kids need about 9 to 12 hours.

Teens: In puberty the body clock drifts later, and melatonin timing moves with it, so “I’m not tired yet” at 10 p.m. can be real biology. Phones outside the bedroom and a steady wake-up time help protect teen sleep.

What you’ll see at home

Lying awake for a long time, asking for water, a hug or one more thing
Saying their head is “too busy” or that they’re scared
Falling asleep easily some nights and not others
Being hard to wake in the morning after a late night
Falling asleep faster on nights after a calm, dim evening

Try tonight

Turn screens off an hour before bed and keep the lights low and warm.
Breathe slowly together three times, in to smell the flower and out to blow out the candle.
Charge every phone outside the bedroom tonight, yours too.

What to say

Instead of“Just go to sleep.”
Say“Your body knows how to sleep. Let’s help it with three slow breaths.”
Telling a tired kid to sleep adds pressure, which makes sleep harder.
Instead of“There’s nothing to be scared of.”
Say“It sounds like that thought feels big. I’m right here.”
Naming the feeling calms the alarm better than dismissing it.
Instead of“Why are you still awake?!”
Say“Hard night. Close your eyes and rest. Rest counts too.”
Rest takes the performance pressure off sleep.

Want the whole crew on your side?

The Kid Brain Toolkit: the 12 hardest moments decoded, from screens off to bedtime, with what to say and what to try tonight. Read it in one evening.

The Toolkit is $9, one payment. For learning only, not medical advice.

Questions parents ask

How long should it take my child to fall asleep?

It varies, and a little time to settle is normal. If it regularly takes a long time, night after night, and bedtime has become a struggle, look at light, caffeine, the schedule and worries first, then talk to your pediatrician if it continues for weeks.

Do I need to give melatonin?

Talk to your pediatrician before using melatonin or any sleep aid. The body makes its own melatonin when evenings are dim and routines are steady, and those habits are the place to start.

My child worries at night. Should I let them talk?

Yes, a little, and earlier in the evening is better. A brief chat before the lights go out lets feelings out, then the bedtime rules take over. Long conversations in the dark can wake everyone up.

Is it okay if my kid sleeps in on weekends?

A small shift is usually fine. Big swings between school days and weekends can push the body clock later and make Sunday night harder.

Sources

American Academy of Sleep Medicine. Recommended sleep durations for pediatric populations (consensus statement), 2016.
Centers for Disease Control and Prevention. About sleep.
Child Mind Institute. Tantrums and meltdowns, calming down, co-regulation, siblings, sleep, teens.
Hartstein et al., 2022. High sensitivity of melatonin suppression response to evening light in preschool-aged children. Journal of Pineal Research.
Carskadon & Tarokh, 2014. Developmental changes in sleep biology and potential effects on adolescent behavior and caffeine use. Nutrition Reviews 72(Suppl 1).
American Academy of Pediatrics, 2011. Sports drinks and energy drinks for children and adolescents: are they appropriate? Pediatrics.

Educational content only, built on everyday habits. It’s not medical advice, a diagnosis or a treatment. If something about your child’s sleep, mood, growth or behavior worries you, talk to your pediatrician.