If you have lollipop molds, by all means use them, but we like to make these freehand. Kids can help with this fun recipe, and it's a great holiday gift.
Cover 2 or 3 baking sheets with foil and arrange 6-inch lollipop sticks on them, a couple of inches apart.
Pour the chocolate chips into a ziplock bag, zip the bag nearly closed, leaving about 1 inch open, and microwave until chips are melted, checking the bag every 30 seconds or so. (Or melt the chips in a bowl for a minute, stir, then microwave for another 10 to 15 seconds and scrape into the bag.)
Let chocolate cool for 30 seconds, then snip a quarter inch off of one corner of the bag and let your child squeeze a nice, thick circle of chocolate atop each stick (we do the outline first and then fill it in), rotating the sticks as you go to secure the chocolate to them. Decorate with colorful sprinkles (jumbo sprinkles, $6, and nonpareils, $4 per color, both at kitchenkrafts.com) while the lollipops are still melty, then chill until firm, 15 to 20 minutes.