A clock
This is a clock. It's on the wall of my room. Maybe you don't know it. Now let me tell you something about it. It has two hands. One is long, the other is short. The long hand is minute hand and there are 60 minutes in an hour. The short hand is the hour hand and there are 24 hours in a day. What time is it now? It's two o'clock. I must do my homework now. Goodbye.