Day 5. Make! A rocket balloon

February 20, 2015

Rockets use the basic scientific law of action-reaction. As burning gases from the rocket engine blast outwards, they push the rocket forwards. Burning needs oxygen, but space has no air and therefore no oxygen. Rockets take liquid oxygen or an oxygen-rich chemical called an oxidizer.

Want to know how to make a balloon rocket? It’s super easy and great fun!

You will need
String, drinking straw, long balloon, sticky tape

How to make
1. Tie one end of the string to something solid and secure, like a doorknob.
2. Thread the string through the drinking straw and tie the other end to something solid and secure several metres away, so that the string is tight.
3. Blow up the balloon and, while holding the neck, stick the balloon to the drinking straw with the sticky tape.

How to use
Let go of the balloon and watch it fly along the string. The air escaping from the balloon pushes it along, like the fiery jet of burning gas from a rocket. The pushing force that moves the balloon and a real rocket is called thrust.

Discover how a rocket launches in more detail here.

Did your rocket blast off? How far did it go? Let us know about your science activities for kids in the comments section below or on Facebook or Twitter.


Also in Our Blog

How to help toddlers with their writing
How to help toddlers with their writing

March 05, 2019

Our new Get Set Go Practice Books have inspired us to think about what parents and carers can do to help encourage toddlers to write...

Continue Reading

Family Bible Quiz Book scoresheets
Family Bible Quiz Book scoresheets

January 30, 2019

Download your Family Bible Quiz Book Old Testament and New Testament scoresheets...

Continue Reading

How to organise Christmas
How to organise Christmas

November 15, 2018

Our super organised Miles Kelly editors share their tips on how to plan for Christmas Day...

Continue Reading