In reply to frank hill:
http://www.chablais-grimpe.com/index_french.html
there's a topo guide available on this site which may be useful, there's also the escalades74 site which has a lot of info on it. There is the via ferrata Le mont at Les Tines near Samoens,
http://www.viaferrata-fr.net/via-ferrata-71-La-via-ferrata-du-Mont-Sixt-Fer... . Close by is a very child friendly crag the Rocher Hubert Ducroz at Les Tines. Samoens is very nice and well worth a visit as is Sixt Fer a Cheval, VF gear can be hired at either.
Post edited at 20:38