Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
We've liked these bubbles so far. I'll admit I'm not much of an expert when it comes to bubble quality, but we haven't had any problems getting a lot of bubbles out of the wand. We are pretty basic in our bubble needs, so we haven't tried it in a bubble gun or anything, but overall it was a good purchase.