The body is what we might consider the main area of the balloon; it’s the spherical or oval-like chamber that we fill with air. The lip is that ring of thicker material that surrounds the balloon’s opening and is where air enters and exits the balloon. The neck is that slightly elongated area leading from the body to the lip.

The balloon should feel full, but not as though it has been filled to its utmost capacity. Stop inflating once it can hold its form with little give. A balloon that’s filled too full can easily pop, and will be difficult to tie off. Ensure that the balloon still has a discernible neck. If you can’t tell where the body ends and the neck begins, your balloon is likely too full.

Shoot for 3-6 inches of give when you stretch out the neck. You’ll need it stretchy enough so that it can wrap around two fingers. Any less and you’ll likely have a hard time trying to tie this balloon off; any more and your balloon might not be fully inflated.

If you’re unable to pull the neck far enough, this could be an indicator that your balloon is too full, or that your neck wasn’t properly stretched. Loosen your grip on the balloon to slowly, slightly deflate it.

You should be pulling your thumb and index finger inward, toward the hand that they belong to.

The “lip” of the balloon is that thick ring of material that surrounds the balloon’s opening, through which water and air can flow. You should make sure the area around you can handle an accidental water balloon explosion, as even seasoned pros will have their fair share of these. Make sure there are no electronics or non-waterproof valuables nearby.

Water balloons are typically smaller than balloons designed to be filled with air or gas mixtures, so keep this in mind if you’re used to dealing with air-based balloons. If you overfill the balloon, it will let you know by politely exploding on you. If your balloon does indeed burst, take note of the point at which this happens to ensure you don’t fill your next balloon to that point. If you are going to fill lots of water, support the balloon from the bottom. Otherwise, the weight of the water will stretch the neck so much, that it will tear apart.

The “neck” of the balloon is that slightly elongated section of the balloon where the main body of the balloon meets the lip.

You should be pulling your thumb and index finger inward, toward the hand that they belong to.