Where does the sun go?

The curious little brother''s mind is always full of questions addressed to the older sister. He knows that the older sister has all the answers, because she always reads many books. In this book, the little brother wonders where the sun goes at night. Do you only go to sleep after a long day of work, or do she dive into the depths of the ocean to make dark day for the nymphs of the sea who are happy there? How will the older sister explain the truth of the little brother? This is a third -level book for children who are ready to read on their own.