Balloon Hovercraft
Professor O will help you learn: A cushion of escaping air reduces friction, so the disc glides almost freely.
⚠️ An adult should help glue the cap and should blow up the balloon (an un-inflated or burst balloon is a serious choking hazard). Keep small parts and balloons away from children under 3. Take care with the sharp centre edge of an old CD.
Steps
- With an adult, glue the base of the pop-up cap over the centre hole of the CD, making sure there are no gaps for air to leak, and let it dry fully.
- Push the pop-up cap down into the closed position.
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📖 Featured in: Rainy-day activities with no trip to the shops
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