Slice one end off the kiwi, so the kiwi sits upright and flat. Beginning at the cut end of the kiwi, use a vegetable peeler to remove some of the kiwi's fuzzy skin.
As you get toward the top third of the kiwi, pull the kiwi's skin away in little jagged bits so that the skin remaining at the top of the kiwi will look like messy Frankenstein hair.
For the mouth: Break a pretzel stick into a small piece (roughly about 1/2" to 3/4" long), and gently push that piece lengthwise into your kiwi to make a mouth.