Melanie had been studying upon things inflation like for years now. Even doing some experiments every now and again, making special things that can turn others and herself into sentient balloons and inflatables, able to go back into their normal size with or without help, but can't turn back into their original looks. Things such as, air or helium infused gumballs, specialized goggles and mask attached to tanks, syringes filled with special transformation & inflating liquid, etc.