Cut 3 of the peaches in half and slice into wide wedges. Add peach wedges and 1 tbsp honey to blender and blend till smooth to make peach purée. No need to peel peaches. (Add 1 tbsp water here if needed for easier blending).
Slice the remaining peach into thin wedges. Filling options: 1. Put in the peach slices and peach puree. Then fill up with flavored yogurt. 2. Put peach purée first and fill up with flavored yogurt and peach slices. 3. Make 3 layers alternating with peach purée, peach slices, and yogurt. Or get creative! For an easier mixture, stir together the yogurt, peach puree, and peach slices and simply pour into molds.