Math can be one of the most challenging subjects for children. Math can frustrate students at just about any age. Parents, at times, will struggle to provide their children with the extra help their children may need. It is up to parents and teachers to do whatever they can to ensure that children are meeting their targets and succeeding in all the areas of math that they need to.
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.