"Kim was so attentive with North, who was looking around at the clothes and clearly a mini-fashionista already," an onlooker tells E! News.
Kourtney's two children, Mason and Penelope, were not with them.
Meanwhile, Kendall and Kylie Jenner, who landed in Paris this morning, returned to the Four Seasons George V hotel for the afternoon.
Earlier in the day, Kim and Kanye were spotted making their way to the gym for a pre-wedding workout.
A source tells E! News that the couple worked out for about an hour inside the gym, then left together and headed back to the hotel.
Clearly, both Kim and Kanye are committed to being in tip-top shape for their big day. The two have hit up Paris' fitness hot spot L'Usine several times to get their workouts in, taking advantage of the impeccably clean gym as they focus on cardio and weight training.
Keeping Up With the Kardashians returns June 8 at 9 p.m., only on E!