first board for kids

[lujoberner]

A friend has asked me which boards buy for kids (aged between 10 and 14 years).

I think that the board must easy to begin in windsurfing, but at the same time it must let to progress, because if not in a short time the board will be too big.

Which model is more adequate? and which volume?

I´d like the Rio S but i don´t know if is the best choice.

Thanks for all.