The 18-year-old Keeping Up With the Kardashians star recently enjoyed a day of family fun as the crew rented out the entire Magic Mountain theme park and rode the rides to their hearts' content.
Yesterday was Kendall's actual birthday and instead of having a huge party like sister Kylie Jenner recently did for her big day, Kendall kept things fairly quiet with a small masquerade dinner.
Kendall wore a red mask with a gold trim, while sister Khloe Kardashian opted for something much more simple.
Kendall also posted a pic of her gorgeous cream-colored cake, which would give any wedding cake a run for its money!
We're glad to see Kendall had such a nice birthday!