I think the specifics should be more about the actual fight.

Which school holiday*? Is budget the most important? Is the carrier itself? Do you mind starting exEU or flying home via SXM or PUJ? Etc. I got the IAH/DFW open jaw and that it was a family trip. ^

* I am Dutch, so for me dates would be better....

And of course more importantly: for something different, why not take them to Asia instead? Good deals to SIN from AMS.