Combine the sugar and water in a small saucepan. Bring to a boil over medium heat and let boil until the sugar is completely dissolved.
Remove from heat and stir in the mint leaves. Let cool until the mixture reaches room temperature.
Strain the mint leaves into a large measuring glass with a spout. Discard the mint.
Stir in the lime juice and club soda.
Pour the mixture into the popsicle molds ¾ of the way to the top. If you are using a mold that lays flat, lay those optional fan leaves (if using) across the surface. They will float up, so just adjust them a bit and add more popsicle syrup or club soda.
Add your desired amount of cannabis tincture to each filled popsicle mold.
Place the molds in the freezer for 4+ hours.