In a microwave, melt white chips; stir until smooth. Stir in coconut extract. Cut a small hole in the corner of a pastry or plastic bag; insert a #3 round pastry tip. Transfer melted chips to bag. Fill ghost molds three-fourths full. Press a lollipop stick into each ghost; top with a small amount of melted chips. Freeze until firm, about 15 minutes.
Remove lollipops from molds. Use melted milk chocolate chips to add faces to ghosts. Refrigerate until serving.