Put the summary of the bug you're having here
What I expected to happen was...:
I thought the firework rocket would go up in the sky and explode into colors.
What actually happened was...:
The firework rocket went up a few blocks in the air and disappeared
Steps to Reproduce:
1. Place a firework rocket on the ground
2. ...
3. ...
Please take a look at this helpfull article on how to craft firework rockets.