There are 5 skill levels in Tell Time. Move the slider to change levels. In the lowest level, time changes in increments of 1 hour. In Level 5, time changes in increments of 1 minute. Tell Time also has the option to show times as either 1-12 hours or additionally showing times with am/pm. In am/pm mode, the sun rises from the right (east) and sets on the left (west). In Tell Time, sunrise is at 6:00am and sunset is 6:00pm. The sky color also changes color with time. To understand am/pm you must think about whether the sun is present and whether the time is before or after 12:00. For example, if it is dark, no sun, and the time shows 2:00, then the time is 2:00am. If the sun is present and the clock shows 2:00 then the time is 2:00pm. Noon is pm, midnight is am.