How are my cousins related to my children? Are they 2nd cousins?
I have never understood how this works..
Your cousins will be your children's first cousin once removed. This is because your children are not from the same generation as you and your cousins. You can learn more on this on http://en.wikipedia.org/wiki/Cousin.
I believe your cousins are your children's 2nd degree aunts and uncles.
your cousins are uncle of your children but not 1st. they are second uncle and aunts
Your cousins are your babies uncles aunt, once remove from your great great uncle. Hence, making you the first cousin 3 times removed from your aunts great grandfather ! ;)
Clem is right, first cousins-once removed