Read on to find out more about games to keep the kids quiet
Board gamesIt's easy to forget the mainstay of rainy afternoons - board games - but they can be great for keeping the peace.
Magnetic sets make the most sense, so you're not constantly diving into the footwells to recover pieces.
There are plenty of dedicated travel sets, too, with Scrabble coming out as our top choice for its brain-training edge and clever design.
You can even build up a library of games in your glovebox with travel editions of classics like Monopoly, Cluedo, Operation or Mastermind, all available for less than a tenner.
Card gamesYou've probably already got a pack of playing cards lying around the house somewhere.
So dust them off, check there aren't any missing and stick them in the door pocket.
Everyone knows simple games like Snap, but a book of card games will only cost a few pounds and give you dozens more to try out on your journey.
You could even win back some of the pocket money you've been handing out with a few hands of Texas Hold 'em.
Dedicated card games are also a lot of fun. Uno is one of our favourites, but Top Trumps is great, too.
One game that aims to turn the journey itself into a card game is Are We There Yet?
You hand out cards listing things to spot, and at the end of the journey add up the points for what's been spotted.
This has the advantage of keeping the kids looking out of the car, which can help to avoid travel sickness.
PuzzlesA few hours with the toys above and you could have the next Einstein and Picasso on the back seats.
To exercise their minds even more, invest in some puzzles like a dismantling toy or even a good old Rubik's Cube.
We'd suggest you keep the solutions somewhere in the car, though, in case the frustration of not being to solve them becomes too great.
Alternatively, most jigsaw manufacturers, like Ravensburger, produce small puzzles for young children that will happily fit on a lap tray.