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. To make your lessons easier tell the child what happens in his everyday life at the time .For example, at 8 a.m. - he always has breakfast, and at 4 p. m. – he goes for a walk every day, etc.
What age is possible to study the time? When he is five years old and you are sure that a preschool child knows exactly such things as "morning", "day", "evening" and "night" and he can tell what events happen in these periods of time. Only after that you can start studying the Clock, for example, in such a way:
1) Show your child a clock and explain that this device can be of different shapes, colors, etc. Explain that there are 60 minutes in 1 hour. A shorthand (an hour hand) moves around and passes a full cycle during an hour, the long hand (a minute hand) during one hour moves from one number to another one.