Okay, my cousin’s kids are also my 1st cousins once removed, and our kids are second cousins. Dagnabbit. This is a little complicated. I explained everything except the second cousin part correctly. Here I was trying to be all helpful…
Anyway, here is a chart. I didn’t use this at first, but maybe it will help you further.
When all else fails, do what I do and call them all your cousin.