Tap on "STOP/RESUME" to pauses and resumes analog clock ticking. When you pause ticking, the second hand will disappear. Tap "HIDE" to hide digital clock. When you adjust digital clock, the clock pauses ticking and moves hands to the time specified. Ask your child what time it is and see if they get it right.
Allow a child to adjust time with time picker and let him/her observe how had moves as time process.