Kylie and Kendall Jenner are extremely competitive with each other
The `Keeping Up With The Kardashians` stars love to play old arcade games such as Pac-Man together but admitted they sometimes take it too seriously.
They said: "We love to play old-school games like Pac-Man, we`re very competitivewitheachother."
However, they also enjoy more relaxing endeavours together too, such as shopping and getting beauty treatments.
They told People magazine: "We love getting manis and pedis to complete our holiday look. We love the Kardashian Kollection polka dot cardigan, it`s perfect for winter nights by the fire or ice skating and a scarf can add flair to any outfit. They keep you warm as a bonus."
Kendall, 17, and Kylie, 15, recently said they want their own reality show away from the rest of their family because they have so many "adventures" together.
Kendall said: "We go on a lot of adventures! We do crazy stuff. We will kidnap one of our friends or get a group together and go to Disneyland for the night. We do what we want to do. We`re just like, `Let`s make it happen!`
"Kylie is my best friend; we have so much fun. I also like working with her because she makes me more comfortable around people and I feel like she brings out the best in me."