Balloon rocket experiment

Simple science experiments are a fun way to get your child learning about how things work. This rocket balloon science experiment includes an easy how-to video.

What you need:

• Balloon
• Long piece of string (about three metres)
• Drinking straw
• Masking tape
• 2 stick-on hooks (optional)

Number of players:
1+

Activity:

Watch the below video to see how to make a fun balloon rocket at home.

First, thread the string through the straw.

Next, either hook your piece of string across a large archway using the two hooks, or rig it up between two chairs.

It works best if one end of the string is higher than the other.

Blow up the balloon but don't tie it off, just hold it pinched shut.

Without letting the balloon deflate, tape it to the straw on the string.

Slide the straw and balloon up to the high end of the string.

Let go and watch your balloon rocket shoot to the end of the string.

How does it work?

Energy is created by the balloon forcing the air out.  This then creates a motion called thrust that pushes the balloon forward.

In a real rocket, thrust is created by the force of burning rocket fuel as it blasts from the rocket's engine – as the engines blast down, the rocket goes up.

• Thanks to our sister company Kidspot Australia for creating the instructional video.