In a large bowl, stir together the yogurt, milk, honey and vanilla extract. Taste the mixture and add a little more honey if needed. Divide half the fruit among 8 ½-cup popsicle holders. Add ¼ cup of the yogurt mixture to each popsicle holder, then add the rest of the fruit. You'll need to press the fruit down a bit to distribute it evenly in the popsicle. Top off with more yogurt mixture if needed, leaving at least ¼ inch of space at the top of the popsicle holder because it will expand as it freezes. Freeze the popsicles for several hours, until completely solid.