Combine all ingredients and optional ingredients (except for chocolate chips, nuts and/or sprinkles) in a blender and whirl until smooth. Then add solid add-ins like chocolate chips, nuts, or sprinkles.
Pour into molds, leaving a little space for the popsicles to expand while freezing. Add sticks (if they don't come with the molds) and freeze at least 4 hours until solid.
Combine chocolate chips and coconut oil in a microwave-safe bowl. Heat in 30-second intervals, mixing well each time, until mixture is smooth ... about 1 to 2 minutes. It takes about a minute of stirring until they're fully combined; I'd use a whisk. Cool and store at room temperature in an airtight container.
Remove popsicle from mold. Dip in or drizzle on the chocolate. You can eat right away or store the dipped/drizzled popsicles on a cookie sheet in the freezer until solid and store in the freezer. The chocolate may whiten a bit.