Make the vanilla and chocolate puddings, according to package instructions.
Transfer each pudding mixture to a pastry bag, and cut a small hole at the end. This is where you will squeeze the pudding through.
In your popsicle molds, layer chocolate pudding, vanilla pudding and mini Reeses. Repeat layering until the molds are filled. Insert a popsicle stick into each mold, and freeze until solid (at least 4 hours).
Notes
If you don't want to make that many popsicles, just enjoy the extra pudding and Reeses on their own :)