As with all things Mason Disick, his third birthday party was absolutely adorable—and we've got the photos to prove it!
Thomas the Tank Engine served as the muse for the Kardashian soiree, and three of Mason's biggest fans were on hand to help their little man ring in the day with style.
Aunt Khloé Kardashian Odom took oodles of Instagrams with her nephew and posted on her blog, "I just wanted to share some pics from Mason's birthday party at Serendipity in Miami. I can't believe he's 3 years old already—I feel like he was just born yesterday."
While momma Kourtney Kardashian looked comfy in a striped long-sleeved shirt so she could play with her little man, and aunt Kim Kardashian joined in the fun too. She even tweeted a photo of the festive party with the caption, "Thomas in the house!!!"
Happy birthday, Mason! We kan't wait to see what this little kutie gets into this season on Kourtney & Kim Take Miami coming in January only on E!