To craft 4 Yellow Fireworks at a time in your Crafting Menu (to be opened with the default key "Q") you will need:
- 1 Twine, made from Vines in a Processor
- 2 Wood Slabs made of most types of Wood or Logs in a Processor
- 2x Gunpowder that can be made from Coal in a Processor, or can be looted or pet-harvested from Hot Feet or Keepas if any kind, or can be found in most Treasure Chests (except for Obsidian Treasure Chests)
- 2x Yellow Pigment made of Yellow Flowers from Cragwood trees in a Processor or found in Obsidian Treasure Chests
Fireworks can be wired up with activation devices like Switches, Number Pads, Sensors or Pressure Plates. Fireworks will then serve as receivers and can be displayed by using such devices from a distance. When wired to an activated activation device, Fireworks will start to go off immediately.
However, Fireworks cannot be "locked", and their interactivity cannot be toggled nor defined with permission settings. Fireworks cannot be set off by Explosives, by fire, nor by using a "fuse" (like made from highly flammable Tar or Shredded Leaves).
Because of their animated effects being displayed in the sky, Fireworks cannot be rotated, neither sideways nor downwards. On the other hand, they can be placed underneath blocks and will still go off, will "shoot" through the blocks above them and will then "explode" in the sky.
Even if you place Firework on the ground, climb a ladder up to the highest altitude in the world that your player character can reach and then use an activation device to start the firework, you will still see the Firework being displayed up above your character's head, not somewhere below.