Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
What can I say? The grandkids love this as its deviously pitched to children. As an adult, it's pretty expensive for the tiny plastic figurines; you're buying the transient "surprise!" that lights up their faces. Probably puts this close to single-use plastics.