What a bust! The thing doesn't work past 2 uses! I wish we had read the reviews before asking Santa for this lovely gift!!! My girls were so DISAPPOINTED! We took forever to put it together. We were satisfied with the first McFlurry...surprised by the inability to fill the cup, but that was okay. But then, we tried to make the second one and had trouble with the O ring, the retaining ring, and the mixing fin guide. Right now my oldest child is crying, because we are taking the gift back tomorrow. Great way to spend the holidays! Thanks SpinMaster!