Kourtney, Ivanka, Molly, and More Shared the Sweetest Snaps of Their Tots This Week!

A sure sign that it's Summer? Celebrity kids are off and running around the world as they take advantage of the warmer weather! Over the past week we saw Penelope Disick soaking up the sun in the Hamptons with her mom, Kourtney Kardashian, Harper Smith scooting around NYC with her mom, Tiffani Thiessen, and Kaius Berman celebrating the Fourth of July on the beach with his mom, Rachel Zoe, just to name a few.

Click through to see this week's cutest celeb-tot candids — all shot by Mom or Dad — and don't forget to follow POPSUGAR Moms on Instagram, Facebook, Pinterest, and Twitter!

01

Tori Spelling had a festive Fourth of July with her girls, Stella and Hattie McDermott. Source: Instagram user torispelling

02

Kim Kardashian wished her niece, Penelope Disick, a happy birthday. Source: Instagram user kimkardashian

03

Arabella Rose Kushner didn't win her raft race, but she had fun trying according to her mom, Ivanka Trump. Source: Instagram user ivankatrump

04

Selma Blair caved and bought Arthur Bleick his first pair of flip flops. Source: Instagram user therealselmablair

05

Mariah Carey calmed her kids, Monroe and Moroccan, during an NYC thunderstorm. Source: Instagram user mariahcarey

06

Harper Smith visited the American Museum of Natural History in NYC. Source: Instagram user tathiessen

08

Madonna's son, Rocco Ritchie, took to the waves with a pal. Source: Instagram user madonna

09

Molly Sims's son, Brooks, wore his thoughts on his chest, saying he only dates models — like his mom. Source: Instagram user mollybsims

10

Soleil Moon Frye took her daughter, Poet Sienna, to her namesake, the town of Sienna, Italy. Source: Instagram user moonfrye

11

Noah Bublé's night was through after his dad's concert in NYC. Source: Instagram user michaelbuble

12

Sunnery and Phyllon James wore their Dutch pride in advance of the Netherlands' loss to Argentina at the World Cup. Source: Instagram user doutzen

13

Brooks Stuber looked a little intimidated by the lobster Molly Sims found in New England. Source: Instagram user mollybsims

15

Harper Smith dressed up for a day of scootering around NYC. Source: Instagram user tathiessen

16

Kourtney Kardashian sunned herself in the Hamptons as her daughter Penelope climbed on her pregnant belly. Source: Instagram user kourtneykardash

17

Rocco Faison was all smiles for his mom, Cacee Cobb. Source: Instagram user caceecobb

18

Rachel Zoe spent the Fourth of July on the beach with her baby, Kaius. Source: Instagram user rachelzoe

19

Willow Hart joined her dad, Carey, on his tour over the holiday. Source: Instagram user hartluck

20

Former president George W. Bush fed his granddaughter, Mila. Source: Instagram user jennabhager