Materials Required:

- Baking Soda (Sodium Bicarbonate)

- Vinegar (Acetic Acid)

- Plastic Bottle

- Balloon

- Funnel

Procedure:

1. Preparation: Ensure that you have all the necessary materials and work in a well-ventilated area. Wear gloves and eye protection.

2. Balloon Attachment: Attach the balloon to the mouth of the plastic bottle. Ensure that the balloon fits snugly to prevent leakage.

3. Funnel: Insert a funnel into the mouth of the bottle. This funnel will help in pouring ingredients without spilling.

4. Vinegar: Carefully pour some vinegar (around 1/4 to 1/3 cup) into the bottle through the funnel. Be cautious not to overfill the bottle.

5. Baking Soda: Add baking soda (about 1 tablespoon) to the vinegar in the bottle using the funnel.

6. Chemical Reaction: The moment the baking soda mixes with vinegar, a chemical reaction will occur, releasing carbon dioxide gas. The gas will start filling up the balloon.

7. Balloon Inflation: As the reaction continues, the balloon will begin to inflate. Continue adding baking soda little by little until the balloon is fully inflated.

8. Safety: Keep the bottle away from your face to prevent any splashing or accidental release of gas.

9. Experimentation: You can vary the amounts of vinegar and baking soda to observe how they affect the rate of carbon dioxide production and balloon inflation.

10. Caution: Do not overfill the balloon, as it might burst. Also, be mindful of the reaction and handle the ingredients cautiously to avoid splatter.

Remember, this experiment involves a chemical reaction, so adult supervision is recommended, especially if children are participating.