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.
This is a very simple story about a boy who thinks his sister is a mermaid. He thinks he has evidence. Illustrations are simple and colorful. Concept is simple and conducive for a discussion about how children in a family relate to each other. Recommended for children ages three to seven.