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Inflate Balloons with Science!

A simple and fun science experiment where baking soda and vinegar react to inflate a balloon, demonstrating a chemical reaction in a kid-friendly way.
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Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes
Servings: 1 experiment
Course: Activity, Science Experiment
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • Balloon
  • Small Plastic Bottle
  • 2-3 Tablespoons Baking Soda Secret fizzy ingredient
  • 1/2 Cup Vinegar White vinegar ideal, apple cider vinegar works too
  • 1 Small Funnel or Paper Cone For easier baking soda transfer
  • Optional: Food Coloring or Glitter For festive visual element

Equipment

  • Balloon
  • Small Plastic Bottle
  • Small Funnel or Paper Cone
  • Tray or Sink

Method
 

  1. Step 1: Load the Balloon: Grab your funnel (or paper cone) and carefully spoon 2 to 3 tablespoons of baking soda into the deflated balloon. Try to get it all the way down into the bulb of the balloon. This might take a little wiggling, but a funnel really helps!
  2. Step 2: Prepare the Bottle: Pour about 1/2 cup of vinegar into your plastic bottle. If you’re feeling adventurous, now’s the time to add a few drops of food coloring or a pinch of glitter to the vinegar. Give it a gentle swirl.
  3. Step 3: Connect the Balloon: Carefully stretch the open end of the balloon over the mouth of the bottle. Make sure it’s a snug fit so no gas escapes. You want the balloon to hang limply at the side of the bottle for now.
  4. Step 4: Let the Magic Happen: Now for the exciting part! Lift the balloon upright, allowing all the baking soda to tumble down into the vinegar. You’ll immediately see a chemical reaction start to happen. The baking soda and vinegar will create carbon dioxide gas, which will fill up the balloon and make it inflate all by itself!

Notes

Place the bottle and balloon on a tray or in a sink for mess control. Ensure a secure seal between the balloon and bottle. Distribute baking soda into the main part of the balloon for optimal reaction. Pre-portion baking soda into balloons for group activities.