I'm trying to implement what this answer is suggesting: softbody simulation, attached to another soft body, copy location constraint, I've followed those instructions. I need it to be a particle as well.
I'm not sure if that's why my simulation isn't working properly.
Rather than following the balloon going upwards as in this person's gif, my string is growing longer and I don't understand why...Here's two screenshots to show - frame 1 and frame 43.
I also uploaded the blend file in case anyone has some time to help me out with this... Thanks in advance!