You may want to let them try and work out how long it will take you to travel somewhere when you get in the car, by telling them what speed you'll be traveling and how far away your destination is.
Math is one subject that must be taught to every human. It is essential for every child to learn it starting at a young age. People have to deal with this subject on a daily basis, so it is nearly impossible for one to go throughout life without having a basic understanding of the subject. There are many ways people can go about teaching and learning this subject. Just be sure to start at a young age and implement it on a daily basis.