Firework shells

 are a kind of miscellaneous item in the Fallout 4 add-on Contraptions Workshop.

Characteristics
Fireworks are a type of controlled pyrotechnic that explodes into colored light in a variety of patterns. They hold very little use in a post-apocalyptic wasteland, but are still entertaining. Other kinds of shells have the ability to change the weather by seeding various materials into the atmosphere.

Locations
All variants can be crafted at a chemistry station or a pyrotechnics mill.