<the scope for visual puns based on the shape of the hat is practically limitless. More than just a prop the hat is also an animated character with its own playful personality. It keeps on shape and scale shifting throughout the story as it responds to Poppy's imagination.../>
<these sketches predate the point when the character colourisation technique was finalised as felt-tip stripes...a pragmatic decision based on how long the animation would have taken to trace and paint.../>