Using these balloons is easy. You can fill them with helium to make them float or with air if you don't need them to float. When using helium, it's recommended to inflate the balloons close to the start of your event so they'll float for about 10 - 12 hours. If you use air, they'll last for 5 - 7 days. Always remember to keep uninflated or broken balloons away from children under 8 as there's a choking hazard. Have an adult supervise when using the balloons. Once a balloon is broken, throw it away right away. These balloons are non - toxic and eco - friendly, so you can use them with peace of mind for various events like weddings, birthday parties, and more.