6 Photos/Videos From Kendall Jenner’s Magic Mountain Birthday Bash Celebrating her 18th birthday, Kendall Jenner was surprised with a party held by her family – but it wasn’t just any ordinary shindig – they rented out the entire Magic Mountain theme park for the day. Everyone was in attendance to join in on the fun – Khloe, Kim, Kylie, brothers Brandon and Brody – even Kris and Bruce put on a united front for the day out despite their recent split. Kim explained in a Keek video: “We’re here for Kendall’s birthday party, we rented out Magic Mountain. No one else is in the entire theme park but us and the people there to greet us. No one is even working in the concession stands. And we get to drive instead of walk.” Check out some of the videos and photos the family shared through their social media accounts below!1.2. 3. 4. 5. 6.