Consume Product

Some could save money too
 
I mean when you think about it, fireworks are often a bunch of lights and sound, which could be replicated in other ways
 
Some of the ideas that came up or I tried to think of were:
 
-laser light display
-glow sticks
-bonfire
-firecracker pinata
-break old things (like a rage room)
-bubble wrap popping
-elephant toothpaste (edit: like diet coke / mentos chemical reactions)
-bubbles
-fireworkless rockets
-fly drone / rc planes