How do you get your children to understand when its time to get up simple stay in bed until you see the sun anyone who has been woken up at 5am with their kids thinking its morning will know where were coming from with the gro clock for children who are too young to read an ordinary clock the gro clock uses the sun and moon to explain the difference between night and day the changing images encourage children to stay in bed longer as they learn to stay in bed until you see the sun