Stoplight Sleep Enhancing Alarm Clock for Kids We bought this digital clock to help our daughter understand when it was okay to get up (it stays red until morning). This clock helps kids establish healthy sleep habits and helps pre-school kids tell the difference between the middle of the night and time to get up! Works great but no instruction manual. (It’s just like other clocks to set the time and has an off for the buzzer if you just want the lights. To set the alarm, rapidly press the "set" button twice until the numbers blink, then use the hour and minute buttons to select your desired alarm time, ensuring the AM/PM indicator is correct. Finish by pressing the "set" button again to confirm the alarm time. Great as a nightlight too.