Life's important questions, 5 year old's edition

My kids like to ask me questions after I've tucked them in for the night - a good technique to delay the sleeping a bit longer. They know I love explaining the world to them, so it's a quite sure thing. Last evening, my 5 year old daughter suddenly asked "Dad, how is plastic made?". I had to give it a bit of a thought and then proceeded to try to explain her the process as I could, hoping I could tell it adapted to the level of a bright, but nevertheless five-year old kid.

Halfway through my exposition, she impatiently interrupts me with "Okay, okay, but how does it end up being blue and shaped as a pony?". Ah, so that's the actual burningly important question :-)