Remove the stems from the pears. Halve lengthwise, then core. Insert a paring knife about 1/4 inch into the tapered end of each pear, then push a thin wooden pop stick about halfway into each. Arrange the pears on a parchment-lined baking sheet.
Microwave the white candy melts in a medium microwave-safe bowl, stirring, until melted, 2 to 3 minutes. Hold each pear by the stick and dip into the melted candy; swirl to coat and let the excess drip off, then return cut-side down to the baking sheet.
While the coating is still wet, microwave the black candy melts in a small microwave-safe bowl, stirring, until melted, about 1 minute. Transfer to a resealable plastic bag and snip off a corner. Pipe faces onto the pears. Let set, at least 1 hour.
Photograph by Ralph Smith