The siblings loved to play tricks on their half-siblings, Kim, Kourtney and Khloe, when they were all living in the same house and admitted one of their favourite pranks was peaking at the brunette beauty when she was having an intimate wash.
Kendall, 20, wrote on her website: ''We'd walk in on Khloé in the shower just to annoy her, haha.''
The pair also picked on Kourtney during their younger years and the raven-haired star recalled taking her shoes because she had small feet.
She wrote: ''Kylie and I were always running around, getting into trouble.
''When we all lived together in one house, the two of us would mess with our sisters by sneaking into their rooms. I remember we'd always steal Kourtney's shoes because she had the smallest feet.''
But they never messed about with Kim's ''evil'' pet dog.
Kendall added: ''And, last but certainly not least, Kim had a dog named Kiska - Kylie and I were sooo scared of her because she was EVIL. Good times! (sic)''
When the pair - whose mother is Kris Jenner and father is Caitlyn Jenner, who was known as Bruce during their childhood - weren't misbehaving they were enjoying themselves on holiday, and Kendall recalled one vacation with former boxer Sugar Ray Leonard, Khloe's godfather, and his family to Hawaii.
She added: ''My first memories of my parents are kind of blurry. I just have a general memory of being in our first house - my favourite house - and all my sisters and Rob living there.
''My whole family and another big family, the Leonards, went to Hawaii one year. We stayed at this huge hotel with a million waterslides and I remember all we did was go on them over and over and over again!''
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