Why Won’t My Child Sleep? Causes and Solutions by Age | IMS Sotogrande

“My child won’t sleep” is one of the phrases we hear most from the families who join our school. Whether they are eighteen months or six years old, the exhaustion is real and the doubts pile up. The first thing you need to know is that you are not doing anything wrong: children’s sleep has much more to do with neurological development than with your parenting.
- Each plane of development changes sleep needs and reasons for waking.
- The prepared environment at home is as influential as the routine.
- The Montessori approach suggests accompanying without forcing, respecting the child‘s autonomy.
- Time changes, light, and temperature are factors that are often overlooked.
Why Your Child Won’t Sleep: Real Causes by Age
The reasons a child doesn’t sleep change radically between birth and twelve years. A four-month-old baby has a sleep cycle of about fifty minutes. They wake because their nervous system is still maturing. A three-year-old may resist sleep because they are discovering their autonomy, and saying “no” gives them power. An eight-year-old might struggle to fall asleep because academic or social pressure generates anxiety. When it comes to my child won’t sleep, it pays to listen to what families and lead guides actually report.
Applying the same strategy at different ages doesn’t make sense. What works for a Nest child (0-3 years) won’t work for a Workshop child (6-12 years). That’s why you first need to identify which plane of development your child is in and what is happening in their life at this moment. Daily practice with my child won’t sleep reveals nuances no handbook fully captures.
0 to 3 Years: Waking as a Signal
In the first three years, night wakings are normal and necessary. The baby needs to eat, needs contact, and their brain still doesn’t distinguish well between day and night. What you can do is help them build clear rhythms. Natural light in the morning, dim light in the evening, and a brief, predictable routine before sleep. In the Nest at IMS, we work with families precisely on this: creating an environment that breathes calm and that the child associates with rest.
3 to 6 Years: Nighttime Autonomy
Between three and six years old, the child is in full development of their will. If “my child won’t sleep” appears at this stage, it often has to do with resistance to letting go of control. They want to decide when to go to bed, what pajamas to wear, how many stories to read. The key is not to give in to everything or impose, but to offer choices within a firm framework. “Do you prefer the blue pajamas or the green ones?” already gives them agency without breaking the routine.

The Role of the Prepared Environment in Children’s Sleep
Maria Montessori observed that the child responds to their environment. If the room is full of stimuli, toys in sight, and screens on, the brain receives signals of activity, not rest. Preparing the space for sleep is as important as the routine.
Some changes that make a real difference:
- Darken the room an hour before bedtime. Melatonin needs darkness to be produced.
- Remove stimulating toys from the sleep area. You can leave a soft stuffed animal or a quiet book.
- Maintain a temperature between 18 and 21 degrees Celsius. Neither too cold nor too warm.
- Use bedding made from natural materials. Cotton breathes better than polyester.
Book a personalized school visit and discover how we prepare the environments at IMS to support rest and calm.

Routines that Respect the Child’s Rhythm
A sleep routine isn’t a complicated forty-minute ritual. It’s a brief, consistent, and calm sequence the child anticipates. Bath, pajamas, story, low light, soft song. Always in the same order. Always with the same calm.
What doesn’t work is inconsistency. If one day you take them to bed at eight and another at ten, their internal clock gets misaligned. Children need predictability to feel secure. When a child feels they know what comes next, their nervous system relaxes, and sleep comes more easily.
How to Handle Night Wakings Without Losing Calm
Waking up at night is normal, even in older children. What makes a difference is how we respond. If each waking leads to a long, stimulating interaction or involves screens, the child learns that waking brings reward. In contrast, a brief, warm, and boring response teaches them that night is for sleeping.
At IMS, we recommend accompanying without entertaining. Put them back to bed with a low voice, without turning on bright lights, without starting conversations. If they need water, offer it. If they need a hug, give a brief one. But maintain the tone that night is still night.

When to Seek Professional Help
There are signs that indicate a sleep problem is beyond the expected. If your child habitually snores, wakes up more than five times a night after age two, has recurrent nightmares that cause daytime distress, or has had a very disrupted sleep pattern for more than a month, consult their pediatrician.
Children’s sleep disorders are solvable when identified early. It’s not about finding blame, but understanding what is happening in your child’s body and mind. The American Academy of Pediatrics publishes updated guidelines on sleep needs by age that can guide you.
Screens and Sleep: What the Evidence Says
I can’t write an article about why a child doesn’t sleep without talking about screens. The blue light from devices, tablets, and televisions suppresses melatonin production. This is proven by research published in journals like Pediatrics. But the problem isn’t just light: stimulating content activates the brain just when it needs to disconnect.
The recommendation from the World Health Organization is clear: zero screens before age two, and a maximum of one hour daily between two and five years. In practice, the most effective approach is eliminating screens at least two hours before bedtime. If your child is six or older, negotiate a clear limit and stick to it every day, not just on weekends.
What We See in the Montessori Classroom
At IMS, we work with children from birth to twelve years old and observe something constant: children who rest well are better able to concentrate, regulate their emotions, and enjoy classroom work. It’s no coincidence. Sleep consolidates learning, regulates hormones, and allows the brain to “reset.”>
In Children’s House (3-6 years), for example, we offer a rest period after lunch. It’s not mandatory to sleep, but to be calm. Many families tell us this school habit has improved nighttime sleep at home, because the child learns that stopping is a natural part of the day.
Frequently Asked Questions
Is it normal for my two-year-old to wake up three times a night?
Yes, it’s common. At two years old, many children still have a shorter sleep cycle than adults and may need reassurance during the night. If the child falls asleep independently at the start of the night and the wakings are brief, it’s probably part of their normal development. Consult your pediatrician if the wakings are very prolonged or if the child shows signs of pain or distress.
Can I use the Montessori method to improve my child’s sleep?
The Montessori pedagogy doesn’t have a specific “sleep method,” but its principles help. Offering autonomy within clear limits, preparing an orderly and calm environment, and respecting the child’s rhythm are actions that facilitate rest. At IMS, we support families with workshops like “Acompañando-té” where this topic is worked on with practical tools.
At what age should my child sleep through the night without waking?
There isn’t a universal age. Each child has their own neurological rhythm. Some children sleep through the night at six months, others don’t until three years or older. What’s important isn’t the age, but that the sleep pattern is sustainable for the whole family. If you feel the exhaustion is too much, seek support. You don’t have to solve it alone.
Are nightmares normal in four-year-olds?
Nightmares are very common between three and six years old, coinciding with the development of imagination. A four-year-old may dream about monsters because their brain is processing real fears symbolically. Talk to them about what they feel during the day, validate their fear without minimizing it, and avoid visual content that might scare them before sleep. If nightmares are very frequent and interfere with their daily life, consult a professional.
Key Takeaways
“My child won’t sleep” is not a parenting failure; it’s a signal that deserves attention. The causes vary with age, temperament, and environment, but there are always concrete actions you can try today: darkening the room, establishing a brief and consistent routine, eliminating screens before bedtime, and responding to wakings with calm.
If you’ve been sleep-deprived for weeks and need real support, we are here. At IMS, we help families in the Campo de Gibraltar and Costa del Sol build respectful sleep habits from day one. Email us at [email protected] or book your visit to learn how we work.