Starting with K:
* Kindred kittens
* Kooky kazoos
* Kaleidoscopic kites
* Knobby knees
* Keenly crafted
Ending with K:
* Sparkling snowflakes
* Milk and cookies
* Chic and sleek
* Silk pajamas
* Quack of a duck
With K in the middle:
* Break the bank
* Squeal and shriek
* Wreak havoc
Let me know if you'd like more options!