Birth to 5: what actually helps

And why we will not build a screen app for your baby, however much we would like the download.

Snag Academy · Updated August 2026 · 7 min read

Parents ask us a version of this constantly: my child is two, do you have something for them? Sometimes it arrives as a specific claim — that a famous technology founder shows greyscale patterns to a three-month-old, so surely there is an app for that.

We looked into it properly, because it deserves a real answer rather than a marketing one. Here is what we found, including the part that costs us a product.

The high-contrast science is real

A newborn's eyes are not small versions of yours. They focus sharply at roughly 20 to 30 centimetres — about the distance from a feeding baby's face to yours, which is not a coincidence. Colour vision is barely working at first, and the cells that detect light and dark are far more mature than the ones that detect hue.

So a newborn sees contrast long before they see colour. Bold black-and-white patterns are simply the strongest visual signal their system can process, which is why they hold a baby's gaze when a pastel mobile does not. Roughly:

Age	What is developing	What helps
0–5 weeks	Focus at 20–30 cm; light and dark only	Your face. Bold black-and-white shapes held close.
~5 weeks	Tracking begins — following a moving object	Slowly move a high-contrast card side to side.
~3 months	Both eyes working together; depth perception	More complex patterns; things to reach towards.
4–12 months	Colour, grasping, cause and effect	Real objects that respond: rattles, cups, doors, faces.
1–3 years	Language, pretend play, sequences	Talking, reading aloud, naming, everyday routines.
3–5 years	Questions, stories, why-does-that-happen	Cooking together, fixing things together, being answered.

None of that is controversial. High-contrast cards are a mainstream product for good reason.

The screen is the wrong way to deliver it

This is where the "baby brain training app" idea falls apart, on three separate grounds.

1. The guidance is explicit

The World Health Organization recommends no screen time at all under one year, states that sedentary screen time is not recommended for one-year-olds, and caps two-year-olds at one hour, less being better. The American Academy of Pediatrics recommends no screens under 18 months, with one exception: video calls with family, because that is a conversation rather than content.

2. Babies genuinely do not learn from screens

There is a well-studied effect here with an unglamorous name: the video deficit, or more broadly the transfer deficit. Infants and toddlers learn measurably less from a video demonstration than from the identical thing done in front of them, and they struggle to carry what they saw on a flat screen into the three-dimensional world — in either direction.

A baby watching a screen is not getting a weaker version of the real lesson. They are often getting almost none of it.

It is most pronounced below age three and fades gradually after. So an app promising to build a toddler's brain through a display is not merely against guidance — it is working against how that brain actually takes information in.

3. The claims are a regulatory problem

Regulators have warned against unsubstantiated developmental claims for infant products and apps. "Boosts your baby's brain" is the kind of sentence that has to be evidenced, and for screens under two it cannot be.

So here is our position, plainly. Snag Academy will not make screen content for children under school age. Our app starts at Class 1, around age six, because that is when a child can actually reason about how a system works and explain it back. Anything earlier would be us taking your money for something that does not work.

What we made instead: printable cards

The contrast science is sound; only the screen was wrong. So we made the thing the evidence actually supports and gave it away: high-contrast cards you print at home, on paper, held at the distance a newborn can focus on. No device, no battery, no account, nothing to buy.

Download the free high-contrast card set →
Six patterns for 0–3 months and six more complex ones for 3–6 months. Print, cut, hold about 25 cm from your baby's face for a minute or two at a time, and stop the moment they look away.

Past three? There is a second free set — Spot the Snag, for ages 3 to 5, where the child finds what is missing and draws it back in.

What actually builds a young brain

The unglamorous answer, which every developmental researcher will give you and no product can sell you:

Talk constantly. Narrate what you are doing. The number of words a child hears predicts a great deal.
Read aloud daily, from before they understand any of it. Board books, in your own language.
Serve and return. They babble, you answer. That back-and-forth is the mechanism — not the content.
Let them handle real things. Water, dough, boxes, latches. Cause and effect you can feel beats cause and effect you can only watch.
Answer "why". Badly, if you must — "I'm not sure, let's find out" teaches more than a confident wrong answer.

When they are around six and start asking how things work, that is when we would like to meet them. The app is free to try, and 63 of its 99 mysteries stay free for ever. The casebook keeps growing, and the free share of it does too.

Sources

This page is general information for parents, not medical advice. For anything specific to your child, ask your paediatrician.