In reply to Mattmon:
There isn't really that much easy climbing in the Mattertal - Medji is the classic crag but nothing at all easy there.
For all the options you want the "Oberwallis" guide by the Swiss Alpine Club which is in German and English. The online guide hasn't yet caught up so the paper option is still the best.
For places with routes less than 6a there's:
Hohtschugge
Seetalhorn
Reidgletscher
Weisshorn
Resti
Fluhalp
and obviously the routes on the Riffelhorn and Gornerflüe.