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Indoor activity

Balloon Hovercraft

Tape an inflated balloon over a hole in a paper plate to build a hovercraft that glides across the table on a cushion of air!

Ages 3-12 0-1 hours Education 7/10

Materials

  • Balloons
  • Paper Plates
  • Scissors
  • Tape

Illustrated Steps

1

Prepare the Base

Poke a 1 cm hole in the centre of a paper plate and flip it upside down.

2

Inflate the Balloon

Blow up a balloon to medium size and pinch the neck closed — don't tie it!

3

Attach the Balloon

Stretch the balloon neck over the plate hole and seal with tape all around.

4

Launch and Glide

Place plate-side down on a smooth surface, release the balloon, and push gently!

What You’ll Create

A frictionless glider powered by air! 🎈 Your little physicists will poke a hole in a paper plate, tape an inflated balloon over it, and watch the plate hover and glide across a smooth surface on a cushion of escaping air. It’s like magic — but it’s science! Experiment with different balloon sizes and surfaces to see what works best.

Have fun!

  • 🏁 Set up a race track with tape lines and race two hovercrafts against each other!
  • 📏 Measure how far each hovercraft travels — try bigger and smaller balloons!
  • 🎨 Decorate the plate with markers before assembling for a custom hovercraft!
  • 🔬 Try different surfaces — does it work better on tile, wood, or carpet?

Why It’s Amazing

  • Air Pressure: The escaping air creates a low-friction cushion beneath the plate — the same principle used in real hovercrafts and air hockey tables! 💨

  • Friction Science: Comparing how the plate moves with and without air demonstrates friction in the most tangible way possible. 🔬

  • Experimental Method: Testing different balloon sizes, surfaces, and push forces teaches the scientific method through play. 📊

  • Engineering Fun: Sealing the balloon properly and finding the right hole size requires iterative problem-solving. 🛠️

Pro Tips

For ages 3–5: Adults should poke the hole and attach the balloon. Let kids inflate (if they can), push the hovercraft, and chase it around. The gliding is pure delight!

For ages 5–8: Let them do most of the assembly with supervision for the hole. Challenge them to predict which surface will work best, then test their hypothesis.

For ages 8–12: Run a proper experiment — test 3 different balloon sizes on 3 different surfaces, measure distance travelled, and record results in a table. Discuss why some combinations work better. Try adding weight to the plate — how much can it carry and still hover?

Secret Pro Move: Use a bottle cap (like a sports bottle cap that opens and closes) taped over the hole — you can control when the air escapes by opening and closing the cap, giving you much better control over your hovercraft! 🎯