We have a 11 month old and a 1 and half infant visiting Chamonix. Wanted to check if they’re allowed to board the train and visit Mer de glacé

I only see information that says ticket is free for kids under 5 years.

Moved to Argentière recently and time to get winter tires installed. Every place google finds seems either sketch or permanently closed or on vacation or something else.

Anyone have a quick recommendations where to go in the valley?

Also, is it better to order tires myself and have them shipped to my place and bring them to the install or order through the tire shop directly?

Merci!