Using these balloons is easy. You can choose to fill them with helium or air. If you want them to float, use helium. Just make sure to inflate them close to your event time, as they'll float for about 10 - 12 hours. If you're using air, they won't float but will last 5 - 7 days. Remember, these balloons are a choking hazard for children under 8, so keep uninflated or broken balloons away from them. Always have an adult around when handling the balloons. And when a balloon breaks, throw it away immediately. These non - toxic and eco - friendly balloons are great for many events like weddings, birthday parties, and more.