Your children and your first cousin's children are second cousins.
You would be your childrens second cousins uncle or aunt, i think... :)
Your first cousins childrens are your second cousins.
Your mother-in-law's brother and his children are not related to you.He is your childrens' uncle and his children are first cousins to your children.
Your aunt's children are your first cousins and theirchildren are your first cousins, once removed.Your children and the children of your first cousins are second cousins to each other.
If two people are first cousins, their children are second cousins. If two people are fifth cousins, their children are sixth cousins.
Third cousins once removed.
Your cousin's children are your second cousins
second cousins to his cousin's children, you'd be third cousins
Your children and your first cousin's children are second cousins.
You and the children of your mother's first cousin's children are second cousins to each other. You have a great grandparent in common.The children of your mother's first cousins are your second cousins.The children of your mother's second cousins are your third cousins.
They are first cousins once removed. Your niece's children and your grandchildren will then be 2nd cousins.
Your children and your first cousin are first cousins, once removed, to each other. Your children and your first cousin's children are second cousins to each other.