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.
My daughter loves that it lights up and makes a froggy 'ribbit, ribbit' noise when you press the button! We weren't expecting that so to get these features was a lovely added bonus. She has played with it constantly since it arrived a week ago.