A sundial is a timepiece that tells the time using the movement of Earth on its axis. As Earth rotates throughout the day, the sun creates shadows that move along with the sun's apparent position in the sky. People discovered that these shadows can be used to tell the time. Although today, it's much more common to glance at a clock or a watch to keep track of the time, people used to rely on the sun to mark the hours.
Have you ever noticed while watching television that when a commercial promotes a new episode, they mention different time zones? That's because Earth is divided into 24 different regions that each have a different time. These regions are separated by longitude lines that are roughly 15 degrees apart. So depending on which way you travel, time moves forward or back an hour for each 15 degrees of longitude that you go through.
From watches to grandfather clocks, there are plenty of analog and digital clocks in your life, and you need to learn how to read them. Telling time is an important skill to learn so you can be on time for all of the fun activities in your day. Playing games and making crafts can help you to practice this skill and have fun!