Water balloons keep kids occupied while draining their youthful energy, making for peaceful summer nights. Balloons, and the water it takes to fill them, cost pennies-on-the-dollar-worth of fun. Become the coolest house in the neighborhood: Fill up water balloons for backyard games. Supervise children playing with water balloons so that none are thrown at people or animals from a high perch, such as a several-story building, or with an intent to hurt.
Fill Them at the Faucet
Take your balloons to the kitchen sink or outdoor garden hose with a tray or bucket for carrying the newly filled water-bombs. Wrap the reinforced lip of the balloon's opening around the head of the faucet or hose like a rubber band. Turn the water on slowly, pinching the balloon's opening in place with one hand and cupping the bottom of the balloon with the other. Pull the balloon off carefully when it is full.
Tying off the Balloon
Pinch the reinforced lip between the thumb and index finger with one hand. Pinch the neck of the opening, holding back the water-belly of the balloon, with the other. Pull the neck taut, creating a tight string of rubber. Wrap that string around your index finger until you make one full revolution, then push the lipped opening through the loop, squeezing past the finger. Remove your finger while pulling the lipped opening tight, creating a knot. Now you're ready to bomb away.