Current UK and WHO guidance recommends no screen time for children under two, and here is what the evidence actually tells us, and what to offer instead.
If you have found yourself handing a toddler a phone to buy five minutes of calm, you are in extraordinarily good company. Almost every parent of an 18-month-old has done it. The question is not whether you are a good or bad parent for reaching for that shortcut: it is what the evidence tells us about how much screen time is appropriate at this age, and what genuinely works better. The short answer is that both the World Health Organization and UK Chief Medical Officers advise zero screen time for children under two, with the single exception of video calls with family members. That is the guideline. The rest of this page explains why it exists, what it is protecting, and, crucially, what you can offer your toddler in its place.
At 18 months, a child's brain is growing faster than it will at any other point in life outside the womb. Neural connections are forming at a remarkable rate, and that extraordinary pace of development is driven by one thing above almost all others: rich, reciprocal, real-world interaction. Screens, however well designed, cannot provide that. They deliver a one-way stream of stimulation to a brain that is biologically primed for two-way conversation, physical exploration, and the kind of contingent response that only a present human, or a well-chosen toy, can give.
WHO & UK CMO Guidance at a Glance
The World Health Organization's 2019 guidelines on physical activity, sedentary behaviour, and sleep for children under five state clearly that sedentary screen time is not recommended for children under 24 months, other than video-chatting. The UK Chief Medical Officers endorse the same position. These are not cautious opinions: they are evidence-based public health recommendations reviewed by multiple independent bodies.
The recommendation is not rooted in moral panic about technology. It is rooted in what developmental science tells us about how toddlers learn. Researchers Hirsh-Pasek and Golinkoff, whose work on playful learning is among the most cited in early childhood development, have demonstrated repeatedly that children under two do not transfer learning from a screen to the real world in the way older children do. This phenomenon, sometimes called the video deficit, means that even when an 18-month-old appears to be watching attentively, information encountered on screen simply does not embed in the same way as information encountered through hands-on, face-to-face experience.
Paediatric researcher Christakis has shown that fast-paced screen content can recalibrate a young child's attention system, making the slower pace of real life, including the back-and-forth of conversation and the patience required to build with blocks, feel unrewarding by comparison. The concern is not a single viewing session but accumulated exposure shaping the brain's baseline expectations about how stimulating the world ought to be.
Language acquisition is perhaps the area where the research is most consistent and most striking. The landmark work of Hart and Risley established that the quality and quantity of verbal interaction in the early years is the single strongest predictor of later language competence. More recently, Sosa's research found that background television alone reduced the quantity and quality of caregiver speech directed at infants, even when no one was actively watching the screen. Language grows in conversation, in the gaps between words, in the look exchanged over a shared object. A screen cannot hold up its end of that exchange.
The Video Deficit in Plain Language
Hirsh-Pasek and Golinkoff's research shows that children under two learn a given task far more efficiently from a live person than from the same instruction delivered on video. This is the video deficit: not a flaw in screen design, but a feature of how the toddler brain is wired to prioritise contingent, social learning above all else.
Beyond language, Diamond's research on executive function demonstrates that the self-regulation, working memory, and flexible thinking that underpin school readiness are built through open-ended, child-directed play, particularly the kind that involves physical manipulation of objects. A screen offers no resistance, no weight, no texture, no cause-and-effect that requires the child's own hands to generate. It is experience arriving ready-made, whereas a wooden shape-sorter, a set of stacking cups, or a simple puzzle asks the brain to do the work itself.
The honest answer is that you do not need to replace a screen with an elaborate activity. Gopnik's research on young children as natural scientists suggests that 18-month-olds learn from almost any object in the environment when they are free to explore it without direction. A wooden spoon and a saucepan. A bowl of water. A basket of differently textured fabrics. The Montessori tradition, which has been informing early years practice for over a century, recognised the same thing: the richest learning at this age comes from real materials with genuine sensory properties, not from content designed to simulate those properties on a flat surface.
Where structured play objects are concerned, simple wooden toys consistently outperform electronic alternatives in research settings. Trawick-Smith's TIMPANI study, which directly compared commercial toys across developmental outcomes, found that open-ended, simple toys generated significantly more language, problem-solving, and imaginative engagement than battery-operated or screen-based alternatives. The qualities that drove those outcomes, texture, weight, unpredictability, and the requirement for the child's own agency, are precisely the qualities a screen cannot replicate.
Explore Jaques London's range of wooden toys, crafted for the hands-on learning that toddlers need mostMany screen programmes and apps are marketed to parents on the basis that they teach colours, numbers, shapes, or letters. These are real categories of knowledge, but the research is clear that 18-month-olds absorb them far better through embodied experience than through passive viewing. A set of wooden stacking rings teaches colour, size, sequence, spatial reasoning, and fine motor control simultaneously, because the child must hold, compare, fail, correct, and succeed with their own hands. Piaget's theory of sensorimotor development, still foundational in early childhood research, tells us that thought itself originates in physical action at this age. The toddler is not yet ready to separate the concept of "bigger" from the felt experience of lifting something heavier.
At Jaques London, established in 1795 and the world's oldest games company, the design philosophy has always favoured materials and forms that ask something of the child. Open-ended wooden toys invite repetition, experimentation, and mastery, all of which Vygotsky identified as essential to the zone of proximal development: that productive stretch between what a child can do alone and what they can do with gentle support. A screen never adjusts to meet a child in that zone. A good toy, and a present caregiver, do.
Browse Jaques London's educational toys, designed to grow with your child through the critical early yearsA Note on Guilt
No reputable researcher in this field is asking parents to be perfect. Madigan's systematic reviews of screen time research consistently note that context, parental stress, and socioeconomic factors all shape outcomes. The guidelines exist to inform, not to condemn. Every reduced screen session is a gain, and none of this is all-or-nothing.
A single session will not cause lasting harm, and no credible researcher would suggest otherwise. The concern is cumulative. What the evidence from Christakis and others shows is that regular screen exposure at this age can gradually recalibrate a toddler's attention and reduce the appeal of slower, richer forms of play. It is less about harm from one video and more about which habits, and which neural pathways, become dominant over weeks and months of repeated exposure. The guideline of zero for under-twos is a population-level recommendation designed to protect the developmental window, not a verdict on any single afternoon.
The marketing would suggest yes, but the evidence is less generous. Hirsh-Pasek and Golinkoff's research on so-called interactive apps for toddlers found that the interactivity on offer, tapping a screen to make something happen, is so shallow compared to real-world cause-and-effect that it does not close the video deficit gap in any meaningful way. Some apps encourage parent-child interaction around the screen, and those show marginally better outcomes, but those outcomes remain below what the same time spent with a physical toy and an engaged adult would produce.
Co-viewing does help, and meaningfully so, when the parent is actively commenting, questioning, and connecting what is on screen to the child's real experience. Research confirms that parental scaffolding can partially offset the video deficit by turning a passive experience into a conversational one. It does not fully eliminate it, however, and it requires sustained attention from the adult: the moment a parent also becomes absorbed in the screen, the benefit evaporates. If you are going to watch something together, treat it as a talking activity rather than a viewing one, and keep sessions short.
This is the most honest question on the list, and it deserves an honest answer. A well-chosen open-ended toy, something with moving parts, varied textures, or pieces that fit together, will hold an 18-month-old's attention for longer than most parents expect, particularly if it is rotated rather than left out constantly. Keeping a small selection of objects that appear only occasionally maintains novelty without any extra cost. When you do need to step away, narrate: tell your child what you are doing and that you will be back. That brief exchange, Gopnik would argue, is itself a learning moment, and one that no screen can offer in your place.
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