Some years ago, my daughter was set a maths problem: how much does it cost to drive a family of four from Melbourne to Sydney, calculating petrol per kilometre and including a night’s accommodation? Her answer was simple: the cost is four airfares – that way the kids won’t kill each other.

Unfortunately, flying is not an option for many people over the holiday period.

So, how do you get the family through that long car trip without all hell breaking loose?

The obvious choice for a long trip is to give the kids a device. But while screens might buy peace in the short term, returning to the real world afterwards can be overwhelming for children.

Lots of passive screen time – such as watching a movie or looking at YouTube – disconnects children from the people around them.

Studies on children up to the age of seven show an association between too much screen time and behaviour problems. Straight after a long time with screens, children can be fractious and argumentative. Parents also know taking the screens away from children can lead to........

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