"Beat buddies (sic)," Teigen, 30, captioned a photo of Pippa and Luna playing in the living room.
"PJ day!" she captioned another post of Luna looking quite content in a cozy white onesie and gray bottoms.
Teigen also posted a video of herself riding in a red wagon with Pippa, while chanting "beep beep!" Also in the shot is Teigen's husband, John Legend, who is in charge of pulling the wagon around the home.
The "All of Me" singer recently revealed to ET that Luna doesn't listen to the same lullabies most babies do. "I have some new stuff from the next album that I sing to her," the 10-time Grammy winner shared. What a lucky girl!
See more about this adorable family in the video below.