Using these balloons is easy. If you want them to float, fill them with helium. Just remember to do it close to your event time so they float for about 10 - 12 hours. If floating isn't necessary, use air. Balloons filled with air will last 5 - 7 days. Keep in mind that there's a choking hazard for children under 8. So, keep uninflated or broken balloons away from them, and always have adult supervision. Also, if a balloon breaks, throw it away right away. These balloons are non - toxic and eco - friendly, and they're great for many events like weddings, birthday parties, and more.