A few months ago, a friend of mine from Bristol – a smart guy, an engineer with an analytical mind – showed me a TikTok video. On the screen, a confident woman with a flawless hairstyle was explaining that modern parents are «overloading» their children with developmental toys, music classes, and Doman cards. «A child's brain can't cope», she said with the air of a neurosurgeon. «It's literally damaging their neural connections.» My friend was nodding along. I looked at the screen and thought: there it is. Another beautiful story that sounds like science, but isn't.
I conducted a little experiment. I forwarded the video to seven parents I know. Six out of the seven reacted the same way: «Oh my God, that's exactly what we're doing. We need to stop immediately.» The panic was genuine. And that's what scares me – not the video itself, but how easily fear for a child becomes fuel for myths.
Let's break down how this works. And why, strangely enough, it's quite interesting.
Where Did the Idea of «Overstimulation» Even Come From?
The concept sounds intuitively logical: if too much light is blinding and too much noise is deafening, then too much information must «overload» a child's brain. It's a neat analogy. The problem is, the brain isn't a sound amplifier or an electrical circuit.
The term «overstimulation» does exist in pediatric practice, but its meaning is extremely specific and narrow. It describes the state of newborns – especially premature ones – in the first few weeks of life, when their nervous systems are not yet physically ready to process intense sensory input. We're talking about the first two to three weeks after birth, about babies in intensive care, about strictly controlled clinical settings. This is not the same as «we bought too many LEGOs» or «we signed our four-year-old up for art and music at the same time.»
Somewhere between the neonatal ICU and parents' WhatsApp groups, this term lost all its clinical precision and became a catch-all scare tactic. It's a classic case of what researchers call concept creep – the gradual expansion of a concept far beyond its original meaning.
What a Child's Brain is Actually Doing
This is where the real detective story begins. Because reality doesn't just debunk the myth – it turns it completely upside down.
A newborn human brain contains roughly one hundred billion neurons. That's about the same as an adult's. But here's the paradox: the number of connections between these neurons – synapses – is an order of magnitude lower in a newborn than it will be at age two. That's because the first years of life aren't a period when the brain is «filled» with information and might «overflow.» It's a period of explosive construction.
Every second, up to a million new synaptic connections are formed in an infant's brain. A million – per second. This process isn't slowed down by an excess of stimuli. On the contrary, it requires stimuli as its building material. The sound of a mother's voice, tactile contact, changing colors and shapes, smells, movement – none of this is a load on the system. It's nourishment for it.
American neuroscientist Pat Levitt once compared the early brain to a garden that needs watering. But to continue the metaphor honestly: it's not a fragile flower on a windowsill. It's more like a tropical rainforest in the monsoon season – it is designed to absorb, grow, and adapt.
Synaptic Blooming and «Smart» Pruning
Around age two or three, something curious happens. The number of synaptic connections reaches its peak – significantly exceeding that of an adult. Then, a process begins that neurobiologists call synaptic pruning – literally, trimming away the excess connections. The brain, like an expert gardener, removes the branches that are rarely used and strengthens those that are active.
This process continues into adolescence and even early adulthood. And this is precisely where the answer to the question so many parents ask lies: «But surely you can't just throw everything at them? Isn't focus important?»
Focus is important. But not in the way it's commonly thought. The brain finds its own focus – through repetition, interest, and emotional resonance. Connections that are activated again and again in the context of pleasure, curiosity, or safety become stronger. Those that aren't used disappear. No single developmental toy can «take up» neural resources forever – the brain simply doesn't work like a hard drive with limited storage space.
So What Does Harm a Child?
This is where I have to be honest – because the story would be incomplete without this part.
There are things that do have a negative impact on a child's brain development. But the list of these things is strikingly different from what you read in popular parenting blogs.
Chronic stress and a toxic environment. Elevated levels of cortisol – the stress hormone – in early childhood literally inhibit the formation of the hippocampus, the brain region responsible for memory and learning. This isn't a metaphor. It's a measurable neurobiological effect. The source of such stress isn't the number of developmental classes, but instability, anxiety, neglect, or abuse in the child's environment.
A deficit of «live» interaction. Here we're talking about a concept that child development researchers call serve and return. A child makes a sound – an adult responds. A child reaches for an object – an adult reacts. This live, human interactivity is the key mechanism for developing language, social intelligence, and emotional regulation. No toy, app, or educational video can replicate this process. Not because they're «too complex», but because they don't respond in a human way.
Passive screen content without interaction. This is perhaps the only area where common anxiety at least partially overlaps with real data. Long hours in front of a screen – especially when an adult isn't involved – do indeed reduce the quality of a child's language environment. Not because they «overload» it, but because they displace live interaction. The difference is crucial.
Why the Myth is So Persistent
I love this question, because the answer tells us more about adults than it does about children.
First, anxiety makes people susceptible to simple explanations. Parenting is one of the most anxiety-inducing human experiences. When someone offers a clear cause («this is why something is going wrong») and a clear solution («just do less»), an adult's brain experiences something akin to relief. Even if the explanation is wrong.
Second, the concept of overstimulation is convenient for a very unexpected reason: it absolves guilt. If the problem is that we're doing too much, the solution is to do less. And «doing less» doesn't require resources, time, or money. It's the most accessible advice on the planet. The market for parenting advice figured this out long ago: selling anxiety is easy, and selling a simple solution is even easier.
Third, and this is the most interesting part, the myth has a grain of truth that it ruthlessly exploits. Children do need unstructured time. Free play – without tasks, without adults organizing the process – is not «doing nothing.» It's one of the most important modes of learning, in which the brain processes, integrates, and consolidates experience. Research confirms this. But this doesn't mean that art, music, or building blocks are «harmful.» It only means that a child's daily schedule shouldn't consist exclusively of structured activities from dawn till dusk.
What Psychology Says About the Real Indicators of Overload
Is there any way to know if a child has had «too much»? Yes. But it's not a theoretical construct – it's an observation of a specific child at a specific moment.
Psychologists working with young children describe several behavioral signals that do indicate a child needs a break: they avert their gaze and turn away from the stimulus, become irritable for no apparent physical reason, lose interest in an activity that recently captivated them, or exhibit behavioral regression after an intense period.
Note: this isn't about the number of classes per week. It's about the signals from a specific child at a specific moment. This is the fundamental difference between science and myth. Science says: watch your child. The myth says: follow a rule.
Furthermore, sensitivity to sensory stimuli is a deeply individual thing. One three-year-old will happily jump between five different activities and ask for more. Another will need more quiet time and a slower pace. Both are within the range of normal. Trying to apply a universal standard of «how many activities is too many» completely ignores this variability.
Doman Cards, the Montessori Method, and the Question of «Early Development»
Since we're on the topic, let's talk about the specific systems that are always a source of heated debate.
Doman cards – a method developed by American physical therapist Glenn Doman in the mid-20th century for the rehabilitation of children with brain injuries – have become a popular «early learning» tool for healthy children. The idea is simple: flash cards with images and words are shown to a child quickly, relying on peripheral perception for memorization. It sounds scientific. But when researchers tested the method under controlled conditions, the results were quite modest. The American Academy of Pediatrics once stated directly that the method is not supported by a convincing evidence base for use with neurotypical children – and that the time spent on flashcards could be used for free play with far greater benefit.
The Montessori method is a completely different story. It isn't built on the idea of «loading» the brain with information. On the contrary, its logic is to create an environment where the child directs their own interest, moves at their own pace, and works with materials hands-on. This aligns remarkably well with what neuroscience tells us about how a child's brain works: connections are strengthened through active, self-motivated exploration, not through passive reception of information. Studies conducted in various countries show consistent positive effects – especially in the areas of executive function and social development.
The takeaway here isn't that «one is good, the other is bad.» The takeaway is that the question of «how much» is the wrong question. The right question is: how? Actively or passively? With interest or by force? With a live human involved or without?
About the «Golden Window» and Pressure on Parents
There's another myth that lives next door to overstimulation – and which is, in a way, its mirror image. It's the idea that there's a «critical window» of development that will slam shut if you don't act in time. Didn't teach them to read by three? That's it, you've missed your chance. Didn't start music by five? The brain has already «closed.»
