Sleep Training for ToddersDesigned to help the younger children understand the concept of time,and develop healthy sleep habits. With sun and moon, younger children will know when it's time to get out of the bed and when to sleep, so say goodbye to early morning calls, parents can sleep longer. Sun & Moon teach Me TimeIn the morning, the sun rises up and the light turns green to tell your little one it's time to get up, kids can get out of the bed. At night, the moon rises and light turns red to tell it's time to sleep, kids will stay in bed. It's easy to develop healthy sleep habit.