my 4 year old daughter was afraid of the dark and this book he likes a lot, it helps to understand why it is dark, how humans and animals react when it is dark, why the shapes are a bit 'disfigured' when it is no longer day . suddenly, she loves and we made a 'ballad' in the house all lights off to better understand the space in the dark, it really liked it. this is now his bedside book!