Using this night light is easy. First, assemble the 4 characters and their buildable environments as you like. For bedtime, put the moon block on the night light. You'll hear lullabies and soft sounds while the star light projector creates a soothing ambience. In the morning, take off the moon and put on the sun block. You'll be greeted with upbeat songs and sunny light patterns. Remember to keep it away from water to avoid damage. If it gets dirty, you can use a soft, dry cloth to clean it. Don't try to take it apart on your own as it might break. Keep small parts out of reach of younger kids to prevent choking hazards.