Well you could make it an animation that when hit it would play that part/montage.
Other than that not sure how you could make it explode… as for getting bigger you can use SCALEMESH using the onhitevent.
Does anyone know a balloon or bubble popping physics? I figured out changing the weight of the balloon, I can’t figure out how to make the balloon expand and then pop. I tried looking for a tutorial but no luck.
Have a great day!