It will be brilliant. Be prepared not to ski all day like in the pre-baby days tho :)
Travel will be easy - like a PP has said, kids are very busy looking around and you prob won't need toys as such for the journey.
If you have one, take a big-wheeled pram (e.g., phil and ted's) as Maclaren-type strollers do not push at all well on snow/ slush. Large-wheeled prams are fine and you can take them anywhere.
If you can fit them in your case, take nappies with you as these cost loads in France. Ditto baby wipes.
Don't forget to pack baby sunglasses with an elasticated strap on them. Also, some sort of waterproof snowsuit for outside play, and some suitable footwear.
If you have ski boots, stuff them full of whatever will go in - nappies, spare bottles, formula etc.
Be prepared for your baby to not eat as much/ be off food if you are going to anywhere at any altitude (e.g., resort at or above 2000 m.) It can make them go a bit funny IME