A rocket balloon is about 3 to 4 inches in diameter and about 3 to 3 1/2 foot long. They are usually thicker than a normal animal balloon and when they are made they do not roll the neck. Think about a regular balloon and at the mouth there is that little roll that helps you blow it up. They come with a short straw that you stick inside and blow through. You don't tie them you just relese them and they fly all over the place while making a really annoying buzzing sound.
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