Enrichment Activity for 5-11 11-14
- Level Elementary
What you need
- An old CD
- A sports cap from a drinks bottle
- Blu Tack
- A balloon
- Place the sports cap in the centre of the cd and fix it in place with the Blu Tack
- Blow up the balloon and, making sure the sports cap is closed, pull the open end of the balloon over the cap
- Place your hovercraft on a flat surface and open the sports cap. Give it a quick tap and watch your hovercraft go!
Results and Explanation
The air rushes out of the balloon and through the cap, lifting the CD up on a cushion of air. The air reduces the friction between the CD and surface it’s on so the hovercraft can travel a surprising distance before stopping.