What's problem you are encountering?
Replacing the "change X" block with the "animate: X-position" makes the script not responsive. I mean, it renders the script unusable. The balloons don't explode on contact with the sprite.
What have you tried that didn't work?
Tried replacing one block with one from the Animation library
Well, there is no problem with the block. Its just when your making it animate, the rest of the script doesn't run until the animation is done. This is why when @cymplecy changed the animation speed...
The balloon popped because it is checking if it is touching the turtle sprite more often. To have the balloon effect, you can use this script: