In a food processor, puree peaches with 1 tablespoon sugar. Transfer to a small bowl.
In another small bowl, whisk together yogurt and 2 tablespoons sugar.
Pour the 2 mixtures, alternating into ice-pop molds, making 3 to 5 layers in each. With a skewer or butter knife, swirl mixtures together in an up-and-down motion. Will make about ten.