This is the scientific experiment chosen by the children.
You will need:
- CDs to recycle
- Bottles tops with special valves
- Permanent markers in different colours
1.- Decorate your CD with permanent markers.
2.- Stick the bottle top in the center of the CD
3.- Blow the balloon and put it carefully on the closed bottle top.
4.- Open the bottle top pulling up the valve.You can see what happens in this video.