'Where the wild things are'; I used to read out this picture book to my children many times when they were little. This picture book especially had an effect to enable the child to feel as if characters coming into play in the picture book. Although the Monsters' appearance was as terrible as that, their character was illustrated as cute, mischievous ones, not the scary or harmful ones. That's also the reason why I liked this picture book.
I found this Ghibli version somewhere. It's always good to find excellently modified pictures like this on the internet.