Try taping the tied-off end of the balloon to a surface using duct tape or another adhesive. Grip the balloon tightly to secure it yourself, holding the tied-off end for the easiest handle.
Press down on the balloon until it pops — this may take longer than it would to pop the balloon using a sharp object.
Make sure the balloon is attached to a surface or is being held securely so that you stab the balloon and nothing else. Scissors, safety pins, and forks also work well to pop balloons.
Always be extra cautious when dealing with fire and make sure that you know how to use a lighter or matches safely before using them at all.
Using a smaller balloon will make popping the balloon this way easier as the smaller balloon won’t be able to expand as much.
Other games include standing back-to-back with someone with the balloon in the middle of your backs as you both try to pop the balloon by pushing back against each other.