Using these balloons is easy. If you want them to float, use helium. Just make sure to inflate them close to the start of your event so they float for about 10 - 12 hours. If you don't need them to float, fill them with air, and they'll last 5 - 7 days. Remember, these balloons are a choking hazard for kids under 8, so keep uninflated or broken balloons away from them. Always have an adult around when kids are near the balloons. If a balloon breaks, throw it away right away. And don't worry, these balloons are non - toxic and eco - friendly, so you can use them with peace of mind. They're great for all sorts of events like weddings, birthday parties, and more.