Before teaching your child how to tell time on a clock, be sure that he knows his letters, numbers, and the parts of a circle (a quarter, a half). If your child feels a necessity to know the time, then he's ready to start learning! If your child feels a necessity to know the time, then he's ready to start learning!
The best way to do that is to play using the Clock with the Hands. For these purposes it is possible to get, make or print the dial so the child could display the time with the help of hand-made or real hands...