- 1). Purchase a helium balloon from a local store. The size and shape of the helium balloon does not matter.
- 2). Hold the helium balloon tightly near the tied opening, which is located where the string is tied to the balloon.
- 3). Cut the knot of the balloon where the string is tied with a pair of scissors. Make sure you're tightly holding the balloon so when you make the cut helium does not escape.
- 4). Bring the tip of the balloon up to your mouth, and carefully release your hold, which will allow helium to escape from the balloon into your mouth.
- 5). Inhale slowly for five seconds as the helium is released. Tighten your grip around the balloon to stop the helium airflow.
- 6). Speak normally, and your voice pitch will now be that of a chipmunk.
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