Addictive design in games and social media: how to protect your child

Your child opens Instagram for "five minutes" — an hour later, they're still scrolling. Roblox won't get switched off. One push notification follows another. This isn't a lack of willpower. It's an algorithm built to keep them in the loop.

How addictive algorithms work

Infinite scroll, autoplay and personalised recommendations are the tools, games and social media use to manage your child's time. None of it happens by accident.

These algorithms are built to be addictive. In practice, that means the platform shows exactly what will keep your child watching for as long as possible. The next video starts on its own. Another round of the game is already loading. A push notification reminds them about a message they haven't opened yet.

Researchers call this the "rabbit-hole effect", and it gets stronger the longer a child stays online. The more they scroll, the more extreme or compulsive the recommendations become. The algorithm is looking for a limit — and it tends to find one very late, if at all.

Games such as Minecraft and Roblox, and the big social apps, all build in features that boost engagement: login streaks, free skins or items available "today only", and a sound or vibration for every single action. It works — and your child has no way of seeing the mechanism behind it.

The EU is taking action

In June and July 2026, the European Union escalated its investigation into Meta, the company behind Facebook and Instagram. The stated reason: using addictive algorithms — the rabbit-hole effect — to keep children in a loop that exposes them to increasingly concerning content at a worrying pace.

In July 2026, MEPs called for a mandatory "youth mode" that would switch off addictive features — autoplay, infinite scroll, push notifications — along with targeted advertising to under-18s, by the end of 2026.

Ofcom's children's safety duties under the UK's Online Safety Act 2023 point the same way: platforms likely to be used by children must assess and reduce the risk from features — recommended systems, autoplay, notifications — that are built to keep them online for longer. It's worth checking Ofcom's own guidance for the latest position, since enforcement is still developing.

This is a first sign that regulation is catching up. But new rules never move as fast as new features do, which is why it's worth acting now rather than waiting for the law to get there.

The impact on children's mental health

Research from the US National Institutes of Health (NIH) and the University of Cambridge points to a clear link between addictive algorithms and children's mental health. Tiredness, disrupted sleep, lower self-esteem, anxiety — these are real, measurable effects.

Children don't experience this as being "hooked". They tend to think something is wrong with them — that they simply don't have enough willpower. That's the wrong conclusion. A child's brain, right up to around age 24, is biologically more vulnerable to addictive patterns, and the algorithm is built to take advantage of that.

Scrolling before bed adds another layer: screen light suppresses melatonin, making it harder to fall asleep. And once an algorithm registers that a child is online at midnight, it tends to push notifications even harder, not less.

Four practical steps to protect your child

This isn't about banning games or social media outright — that's neither realistic nor necessary. It's about awareness and control.

1. Turn on restricted mode. Instagram, TikTok and YouTube all offer a "Restricted Mode" or "Supervised Experience". Switching it on disables autoplay, cuts down notifications and limits how hard the algorithm can pull your child in.
2. Set access times. Parental controls on iOS, Android and Windows let you fix the hours a device can be used and cap how long for. Your child can play from 5pm to 6pm — full stop. The tool does the work you'd otherwise have to do yourself, every evening.
3. Turn off push notifications. Every notification is an invitation to come back. Switch them off for games and social apps, so your child uses them on their own terms — not the algorithm's.
4. Talk about it openly. Explain what an algorithm is and why platforms use one. A child who understands the mechanism is better placed to push back against it.

Roblox: a sign the industry is starting to shift

In August 2025, Roblox — the games platform most children under 13 will know — announced it was sharing its AI tool for tackling toxic chat with other companies. That's a positive step. But problems remain: Roblox is not immune to addictive design itself, and it has a track record of leading young players into real spending through Robux, its virtual currency.

Platforms starting to respond is a good sign. Waiting for regulation to force the rest of the change is a risk to your child's wellbeing right now.

What's worth remembering

Addictive algorithms aren't a new invention. They're built, on purpose, to increase the time someone spends on a platform. It works. But you have tools to blunt its effect.

• Turn on restricted mode and parental controls today, not tomorrow.
• Switch off push notifications for anything that isn't essential.
• Agree access hours — and stick to them.
• Talk to your child about how algorithms actually work.

The research is clear on one point: children who understand how the addiction mechanism works are more resistant to it. With some technical controls and the right conversation, you can help build that resistance.