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Put your bag on the back seat next to the child

Any parent or carer can forget a child in the back seat. Put your phone or bag back there too, so parking means opening that door.

Built from what people shared online about not leaving a child in a car, with the temperature figures and the safety lines checked against the American Academy of Pediatrics and a UK fire and rescue service in October 2026.

Read this first

If you see a child alone in a car, call 911 in the US or 999 in the UK first. The American Academy of Pediatrics says that if the child is unresponsive or in pain you should get them out and spray them with cool water, not an ice bath, and that if the child is responsive you should stay with them until help arrives. If you have just realised your own child is still in the car, go to them now, and call 911 or 999 if they are unresponsive or in pain. A car does not need a hot day to be dangerous: the Academy says a car can heat up by about 20°F (11°C) in 10 minutes, a child’s body heats up 3 to 5 times faster than an adult’s, and dangerous conditions can develop when the outside temperature is as low as 57°F (14°C). Do not leave a child alone in a car, even for a short stop; take them with you.

You would know. You love this child, you are careful, and you cannot picture walking away from a car with them still in the back. That is the feeling that makes this hard to guard against, because the feeling is not what protects them.

Put something you cannot do without, such as your phone, bag or wallet, in the back seat beside the child before you set off, so that parking means opening the back door.

Many people suggest the same trick: leave a shoe, a phone, a wallet or a bag beside the child in the back, so that you look when you reach for it and it is not there. The American Academy of Pediatrics lists it among its ten tips for preventing a child being left in a car: put your cell phone, bag, backpack or purse in the back seat, which helps you remember to check the back seat when you arrive. One of the other tips is simpler and comes first on its list: always check the back seat before you lock the car and walk away. The object is the backup for the days the look does not happen.

Why a trick, not trying harder

Some people say the mistake comes from how the brain handles habit: a drive you make every day runs on autopilot, and the autopilot does not always include the child. They say it does not make you a bad parent or a careless one, and that it can happen to anyone. The Academy says the same: any parent or caregiver, even a very loving and attentive one, can forget a child is in the back seat.

If that is true, then the thing that protects the child cannot be remembering harder. It has to be something that makes the car ask you. A bag you need is good at it, because you notice it missing at the moment you most need it. You still do the look. The object catches the day you forgot to.

Some people object that this is aimed at the wrong parent: reminders are unnecessary if you pay attention, and the idea implies that good people forget their children. Other people argue the reverse, that people deny their own forgetfulness and that a reminder which does not rely on attention is exactly the point. The Academy’s line above answers it: attention fails for attentive people too, so a cheap reminder costs a careful parent very little.

The days that need more care

Many people say the mistake tends to follow a change of routine, for example when the drop-off duties are swapped, because the change breaks the autopilot. The Academy gives the same warning: be extra alert when there is a change in your routine, such as someone else driving your child or taking a different route to work or child care. On those days it also says:

If someone else is driving your child, always check that they have arrived.
Have your child care provider call you if your child is more than 10 minutes late.
Avoid distractions while driving, especially cell phone use.

That last one matters for the trick. A phone in the back seat is out of reach, which suits the Academy’s advice. If your phone is your map or your music, put a bag or a wallet back there instead, and do not reach for anything in the back while the car is moving.

Why it is worth ten seconds

The Academy gives figures that make a short stop or a cool day less safe than they feel: a car can heat up by about 20°F (11°C) in 10 minutes, a child’s body heats up 3 to 5 times faster than an adult’s, organ damage can start at 104°F (40°C), and dangerous conditions can develop when the outside temperature is as low as 57°F (14°C). A UK fire and rescue service describes car glass as behaving like a greenhouse, with temperatures rising quickly in sunshine and a child able to become dangerously ill within minutes.

The Academy’s other tips are for the opposite problem, a child who gets in alone. Keep the car locked when it is parked so a curious child cannot climb in, make sure children cannot easily reach your keys, keep fold-down rear seats closed so a child cannot crawl into the trunk (the boot, in the UK) from inside, and teach children that cars are not places to play. A UK fire and rescue service adds: keep your keys on you, and keep spare keys at home.

Who this page is not for

If you carry several children as part of a job, a bag on the back seat is a start and not a system. The Academy’s list leads with the look, every time, and a workplace may need more than this page covers.

If the child rides somewhere other than the back seat, put the object where you would have to open that door.

If your question is about fitting a car seat, headrests, or the locks on the rear doors of a taxi or ride-share, this page does not cover it.

And if this has already happened to you, or nearly did, this page is not the help you need. It is a heavy thing to carry alone. In the US you can call or text 988; in the UK, Samaritans are free on 116 123, day or night.

Common questions

I am careful. Do I really need a trick?

The American Academy of Pediatrics says any parent or caregiver, even a very loving and attentive one, can forget a child is in the back seat. Some people say forgetting does not make you a bad parent or a careless one; it can happen to anyone, including organised people, because the brain runs a familiar drive on habit. Some people argue that reminders are unnecessary for a parent who pays attention, and some that people deny their own forgetfulness, which is why a reminder that does not rely on attention is needed. The Academy sides with the reminder.

What if I only drive a child now and then, or it is not my child?

That is a changed routine, which is when the Academy says to be extra alert. Look in the back before you lock, and put your bag or phone back there, the same as a parent would. If someone else is driving your child, the Academy says to check that they have arrived safely, and to ask your child care provider to call you if your child is more than 10 minutes late.

What do I do if I see a child alone in a car?

Call 911 in the US or 999 in the UK first. The Academy says that if the child is unresponsive or in pain you should get them out of the car and spray them with cool water, not an ice bath, and that if the child is responsive you should stay with them until help arrives, while someone else looks for the driver. Rules on forcing your way into a locked car can differ by state and by country, so let the call handler tell you what to do.