Using these balloons is super easy. First, you can choose to fill them with either helium or air. If you're using helium, just attach the balloon to a helium tank and let the gas fill it up until it reaches about 12 inches in diameter. For air, you can use a balloon pump or simply blow it up by mouth. When using them for decorations, you can tie them together in bunches and hang them from the ceiling or place them around the venue. Remember, this listing only includes the balloons, so don't expect any other decorations. As for storage, keep them in a cool, dry place when not in use. Since they're biodegradable, they'll break down over time, so it's best to use them within a reasonable period. And always handle them with care to avoid any accidental popping.