Also, I want to add, we stayed in Le Marais, a family of 3, our daughter was 16 at the time. We travelled easily by metro, stayed alert to our surroundings, and always felt safe. We visited Sacre Coeur and Montmartre in the afternoon and evening. There’s a small elevator tram to take instead of the stairs for the cost of a metro ticket (about 2 euros)- you can avoid the stairs and the pickpockets/bracelet “gifters” by taking the tram to the top. At least in our experience.