Treat math as exciting _ Use bright objects to explain basic concepts of addition and subtraction. This is the nice thing about math. It opens you up to a world of opportunities. I used my floor tiles to explain the concept of area. Apples and other colorful fruits can be used to demonstrate addition and subtraction easily. Fractions are better understood when they can be visualized so use their regular picture puzzles to explain fractions _ they are pieces of a whole so why not? The same thing applies to pieces of apples and oranges. Flash cards and games also spark interest _ some teachers/parents swear by the math smart card games. Download some of the free math worksheets and resources online; some are very creative. I cannot emphasize this enough. The internet has a wealth of fun math resources.
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.