Object: a tree log.

Good morning, boys and girls. Have you ever thought of the many ways there are to tell time? There are watches and clocks, as well as sundials, to tell the hour of the day. We have calendars to tell us the day and the year. Today I have brought with me a very special kind of time teller. [Hold up the log.] Did you know that you can tell time with a log? Sure you can. Who knows how to tell time with a log? [See if one of the children can tell you.] That's right, there is a circle for every year that the log lived as a tree. Our log lived for five y…