While in Europe, I usually try to stay at a 4 star Mercure as I have had better experiences/received more value there as opposed to the Novotel brand. Interestingly, the age of children as well as the number allowed varies from property to property. This can get complicated so I recommend you check the details before you check-in at any Accor hotel. I use a different brand in other parts of the world.

Have fun.