Dorénaz "Parking Télé" is one of the best bouldering area for family and beginners. In a really compact area you can find more than 30 boulder problems in easy-moderate grades with less than 3 min walk.
The rock type is a mix of gneiss and conglomerate which offers surprising holds, technical foot holds and pockets.
The terrain is flat and you even have pic-nic table ready to use. This area is really exposed to the sun which make a perfection area for winter bouldering. It's definitely too warm in summer but it can always bit a nice place to sunbath and enjoy some "easy" climbing.