system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do they make fireworks so that they explode in particular shapes like stars, instead of out in every direction?
gpt
There's a "How It's Made" episode on it... super fascinating and you should watch it! Basically they pack them in the cylinder with plastic pieces that help provide a platform for the metals/powder to explode from. Keep it seperated. Then how they position those pieces make the shape..hopefully.