How do I make it so parts disappear after being blown up by a bomb or a rocket launcher?
I tried using a humanoid instance along with a script which destroys the block when the humanoid's health reached 0 but rockets or bombs didn't affect the humanoid's health.
Use the Debris service.
game:GetService("Debris"):AddItem(item,time) -- First parameter is the instance, and the second is the amount of time taken to delete the Instance.