I think that I'm with Phill on having a boat that the kids can rig as I know the boys are often frustrated that I don't immediately jump when they are ready to go sailing (we live on the beach, so this is quite often). The other thing is that the boat has to be light enough for them to get it down the beach without my help. As for traps, they have ample experience with that and enjoy it, but I'd guess they'd hands down like the independance of going sailing when they want over having to wait for me (even once).
I don't see that unstayed rigs and traps are mutually exclusive as a trap wire would unload the rig when you need it most, will write an email to RG to see if he'll calculate that for me.
Speaking of RG, he sent me a whole new F12 design today to look at and comment on, is hands down the coolest boat Ive seen in a while and the boys agree, hope he posts it here for you all to see soon.
Aerynt