Yogurt freeze pops

My daughter is not a fan of Popsicle but she loves yogurt and I saw this in Rachel Ray's Yumm-O cookbook. She used Key-lime Yogurt but we like Strawberry so we used that instead. And H was able to do everything except put it in the freezer.
The recipe:
Dixie cups or popsicle molds
Yogurt
Blueberries
Popsicle sticks
spoon in yogurt add berries and a Popsicle stick and freeze can't be any easier. When you are taking them out of the freezer to eat warm a cup of water in microwave and dip cup in there for about 20 seconds to loosen it from the cup