For those unfamiliar with kittens... The standard kitten package includes:

• One (1) kitten with
  • Two (2) pointy, velvet-soft ears under independent swivel control
  • Two (2) disproportionately large eyes (Note: Eyes may not be visible immediately after unpacking kitten. DO NOT attempt to examine kitten eyes unless already open and blinking in adorable manner.)
  • One (1) slightly damp nose
  • Two (2) bunches of whiskers, one per side of head. (Note: DO NOT attempt to trim, style, curl, tease, perm or dye whiskers. EVER.)
  • One (1) mouth, full to the brim with very sharp, yet small, teeth.
  • One (1) tongue, pink, small, and covered in organic rasping surface.
  • Four (4) legs of inconsequential strength
  • Four (4) paws, loaded with very sharp, very small claws.
  • One (1) tail. (Note: Most kittens are unaware of the presence of their own tail. DO NOT attempt to introduce them to it by tying on a bit of string, catnip, a small child, or a wombat.)
  • One (1) integral handle located at the scruff of the kitten's neck. (Note: DO NOT attempt to imitate feline behavior by gripping the kitten handle in your teeth. It's just plain wrong.

DO NOT assume that because your kitten has a handle, it should be treated like a briefcase. Use the kitten handle only when moving the kitten swiftly is of vital importance (e.g. when a piano is about to squish it, or when a savage dog threatens to eat it). Otherwise, encourage kitten to walk from place to place with gentle nudges or proffered nutritious snacks.

The cat handle is useful for discipline. Pick them up by the scruff of their neck, and swat them firmly on the nose with the tip of your finger. You can't hit them hard enough to cause pain by doing this, but it is an effective deterrent. While doing this say in a firm voice "No!". Eventually, just saying "No" in that tone of voice will have the same effect.