My 15 month old grandson loves the original book. It frustrates him because it is too hard for him to find the mouse. It is there somewhere if you find the right spot to touch to make it visible, but it is not even easy for an adult to activate the mouse on some of the pages. There should be a setting to leave the mouse visible for the young (under 19 months) reader.
nickh2012 about Goodnight Moon - A classic bedtime storybook