I have canvassed some consultants.
They are 11 year old girls. My daughter has sailed at sail camps on opti's, sunfish and lasers.
She has been with me on a H16 a lot and we have a H14.
She has also sailed on a wave.
I asked what her favorite boat was and she said the Wave.
I asked what is fun to do while sailing?
She said: They played dodge ball at sail camp on the boats. They had games where they sailed up to a marks and had to tie knots.
They flipped boats and did righting drills, also man overboard rescues.
I asked if she would want to sail by herself or with someone.
She said she would rather have another kid on the boat with her. (that social thing again)
I asked about a smaller boat like a 12 footer.
She said it would be fun to sail by herself if it didn't flip.
If she had someone with her that flipping would then be fun as long as they could right it easy.

If you have kids in the age range, maybe you could ask them similiar questions and let us know.