You will definitely need some kind of dispenser (nanginators as they're known round these parts) or failing that one of the hand crackers. The former you can inhale directly from the nozzle or discharge it into a balloon, whichever you're more comfortable with. The hand crackers you definitely need balloons for unless you fancy face-destroying frostbite from attempting to do it directly
(that's a joke, don't try to do that!!). I would personally recommend one of the whipped cream dispensers if you've got weak girly hands like me, they're just so much easier. Although it is the more expensive option.