Things You'll Need
Instructions
Place a thin coating of petroleum jelly onto the doll's neck and the opening in the doll's head.
Heat the opening of the doll's head with the heat gun until the vinyl softens and becomes pliable.
Work the head onto the plastic knob using a twisting motion. If necessary, apply heat while pushing the head into place.
Continue to apply heat and pressure until the head pops into place over the knob on the doll's neck.
Wipe away the petroleum jelly with a damp cloth.