To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
Thank you to whoever invented this. What a great idea, you can take it anywhere and actually take your off your child for a minute as even if they draw on themselves or your lovely walls- you'll never know!! Hours of fun!!