How about starting the tradition of giving math riddles, puzzles to your children?
Here's an old one, and still a good puzzle:
Two old women started at sunrise and each walked at a constant velocity. One went from A to B and the other from B to A. They met at noon and, continuing with no stop, arrived respectively at B at 4 p.m. and at A at 9 p.m. At what time was the sunrise on this day?