Your second cousin and your child are second cousins, once removed.
Your second cousin's child is your second cousin, once removed.
Of course, your first cousin's child is related to you; you have ancestors who are also ancestors of your cousin's child. Your first cousin's child is your first cousin, once removed. Your second cousin's child is your second cousin, once removed.
Your second cousin and your child are second cousins, once removed.
Assuming both children are on the same side of the family, your child's first cousin is a second cousin to your first cousin's child. Your child is also a second cousin to your first cousin's child. Your child can have first cousins who are not related to your first cousin and thus not related to your first cousin's child.
The child of your father's first cousin is your second cousin.
Your second cousin is your parent's cousin's child. You and your second cousin share a great-grandparent (not a grandparent).
Your first cousin's child is your first cousin's, once removed. Your second cousin's child is your second cousin, once removed. Your third cousin's child is your third cousin, once removed.
Yes, you are blood related to your second cousin. Your second cousin is the child of your first cousin, who is the child of either Aunt or Uncle(your parents brother or sister).
Your first cousin's child is your child's second cousin. Your second cousin's child is your child's third cousin. Your third cousin's child is your child's fourth cousin. and so forth
Your first cousin's child would be your second cousin
Your second cousin is the grand child of the brother or sister of one of your grand parents.
Your child is your cousin's second cousin. (And he/she is your child's second cousin)