How to Make a Balloon Rocket

This is a simple science experiment to understand the newton’s third law, which states that “Every action has reaction”. You will build a simple rocket out of a balloon and straw that will slide over a string by producing thrust.

Balloon Rocket

Required Materials

  • 1 Balloon
  • 10 to 15 feet of string
  • 1 Drinking Straw
  • Tape


  1. Bring two chairs and place them 10 feet apart.
  2. Tie one end of string with one of the two chairs. Pass another end of string through the straw and tie with second chair tightly so that string bound between two chair become flat.
  3. Blow up the balloon and pinch the end of the balloon with your hand so that no air escapes from it.
  4. Tape the balloon with straw while holding the end of balloon closed (ask your friend to help you).

When you want your rocket to slide over string, just leave the end of balloon so air from balloon rushes out of it. Watch your rocket!


When you allow the air to rush out of the balloon, it creates thrust which propels rocket forward. So how this thrust is produced? Actually balloon forces the air to rush out of it which in turn pushes the balloon in its opposite direction. That’s what the newton said “Every action has reaction which acts in opposite direction” that means if air is rushing leftward than balloon will propel to rightward.

How Balloon Rocket Works


  1. Use two same size balloons in place of one and tape them with straw in opposite direction and see what happens!

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