Gato,
I have built many boats many different ways.
Provided you have well thought out building instructions the deep V should be the quickest to build.
It should keep the kids interested.

When I post my building pics you will see how much simpler the Blade 12 is to build when compared
to the method used on the 16. And while it will have a lower draft and carry more weight than the V
it would still take a little bit longer to build.

I wish you the best of good fortune and will follow your work in getting these kids involved with great interest.
Good luck.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!