The reality star, 40, put parenting first, quickly scooping up her youngest while leaning over to give Saint a sweet kiss on the lips in an Instagram post from the scene.
The Instagrams come after word Kim and the kids met up with her estranged husband Kanye West, 44, in San Francisco over the weekend.
'They were excited to be there, and everyone seemed to be getting along great between Kim and Kanye,' the source said.
Another source said: 'Kim and Kanye are getting along.
Family reunion:Â The Instagrams come after word Kim and the kids met up with her estranged husband Kanye West, 44, in San Francisco over the weekend
It has also been reported the reality star is 'happier' now that she's split from Kanye, as she knows it was the 'right decision'
On good terms:Â 'They were excited to be there, and everyone seemed to be getting along great between Kim and Kanye,' an insider said of the family museum visit