At home for 5-11 11-14
- Level Elementary
What you need
- A drinking straw - cut in half
- A balloon
- A long piece of string
- A clothes peg
- Sticky tape
- Blow up the balloon and peg the neck to keep the air in
- Thread the straw with the string and then tape it lengthways to the balloon
- Tie the string across the room
- Now unclip the peg!
Results and Explanation
As the air rushes out it pushes back on the balloon propelling it forward.
These experiments have not been specifically safety tested for home use but we believe them to be safe if the instructions are followed. Adult supervision or direction is recommended as appropriate. All experiments are carried out at your own risk.