This is the (children's childrens') room these are the (boy's boys') families my (son's sons' ) names are ben and tom look at the (womens' women's)hats this is my (sister's sisters') daughter do you know the (mans' man's) name.

This is the children's room. 

These are the boys' families.

My sons' names are Ben and Tom.

Look at the women's hats!

This is my sister's daughter.

Do you know the man's name?