Prep: 10 minutes; Cook: 5 minutes; Stand: 5 minutes; Freeze: 4 hours. If you want to make a liquor-free treat, substitute apple juice for the prosecco.
Combine sugar and water in a small saucepan; bring to a boil, stirring constantly. Boil 30 seconds, remove from heat, and let cool 5 minutes.
Combine sugar syrup and prosecco.
Add 1 or 2 pieces fruit to each of 8 molds. Fill molds with prosecco mixture, and add the pop sticks; freeze about 4 hours or until firm.