What we've done in the past was invite our son's school friends for trips/weekends. It was kinda cool because we were able to introduce kids to sailing that would not likely have been, and the friend was a known entity as far as getting along with our son.
You have enough boat to invite your child's friends AND their parents if you wanted to.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)