Cork Rocket Experiment

An experiment that will blow their mind!
An experiment that will blow their mind! Photo: Paging Fun Mums

This Cork Rocket Experiment was so much FUN for the whole family!! It's a great way for kids to learn about Science through FUN!! It would also make a great science fair project.

What you'll need

  • Safety Goggles
  • Recycled Wine or Champagne corks
  • Empty plastic drink containers (we used two varieties with differing sized openings to best fit our corks)
  • Bicarb Soda (baking soda)
  • White Vinegar
  • Thumbtacks
  • Curling ribbon
  • Paints, Permanent markers and stickers to decorate your corks and bottles if you wish. 

Paging Fun Mums - Cork Rocket activity


Firstly you will need to make sure the corks fit snugly inside the bottle opening - the experiment will only work when there is a tight seal.

I spray painted both the large bottle and corks, then used stickers to decorate them in a space theme. We used the thumb tack to secure some curling ribbon to the base of some corks - these looked great and made the corks easier to spot as they were launched into 'space'.

Safety first - This is designed to be an adult supervised outside activity. You will ALL need to wear safety goggles to protect your eyes and NEVER aim the corks towards anyone - it is best to have all observers stand a few meters away from the launch site.

Then comes the BEST part - launch time!!

Simply fill each bottle with 125ml of Vinegar, add 1 tablespoon of Bicarb Soda, very quickly squeeze the cork into the top of the bottle and stand clear... 3, 2, 1 We have lift off!!

Your cork will shoot straight upwards for quite a distance - you will also find the force makes the bottle 'jump' in the air too.

Paging Fun Mums - Cork Rocket activity

Why does the cork pop? The Vinegar and Bicarb Soda are mixing together creating a chemical reaction - this reaction is creating a build up of carbon dioxide gas. This gas has nowhere to go as it expands inside the bottle and eventually makes the cork 'rocket' explode into the air!

If you want more fun crafts, activities, recipes and ideas, head over to the Paging Fun Mums website or follow them on Facebook.