Balloon Hovercraft

How does a hovercraft hover?

I predict that The Hovercraft about three cm above the table, because the air that you breath in it will make it hover.

• CD
• Bottle Lid
• Balloon

Step 1: Glue the bottle cap over the CD hole. Step 2: Blow up the balloon. When it is fully inflated twist the end so no air comes out. Step 3: Stretch the balloon over the end of the bottle cap. Step 4: Open up the and place the CD on the surface Step 5: Untwist balloon and and let go.

The air from the balloon comes out of the open bottom of the bottle cap so the air coming out make the Hovercraft hover and move with the air.

The air from the balloon creates a cushion of moving air between the disc and the CD and reduce the friction across the surface.