Car rides can be boring for kids, but here's some ideas you can do to keep the kids happy without needing technology.
1). I spy
All kids should have played this game at least once in their life. Get the kids to take it in turns, including you spying something in or out of the car. Younger kids can sound off their word, for example "I spy with my little eye something starting with sh".
2). ABC Categories Choose a category (animals, countries, people's names) and take it in turns and go through the whole alphabet thinking of things in that category that starts with each letter of the alphabet.
3). Car Bingo Make up bingo sheets before you go, put things on the bingo that you'll see on your road trip. This could be cows, stop signs, traffic lights, a yellow house, Red Rooster, a petrol station, anything. Get the kids to keep an eye out for these things then tick them off once when they see it.
4). Twenty Questions Think of an object and get the kids to ask you yes or no questions about it. It should take about 20 questions until they finally get it right. The person who guesses it correctly then gets a turn at choosing something.
5). What Animal am I thinking of? This can work with young kids and older kids. Think of an animal and give the kids some clues about it, until someone guesses.
6). Name that Tune This works with little kids, kids who are aged 6 and up and even teenagers.
Prepare a CD with songs on it. Play a little bit of the song and then pause it (or get the person not driving to do it). The kids must call out what song it is.
7). Rhyming Time Somebody says a word, then other people take it in turns to say a word that rhymes with it. To make it funny for the kids, after you've said proper words, people can make up their own words that still rhyme.