You’ll need a large tin foil container and a kitchen roll tube. Place the foil container upside down and make a hole in the top of the foil container, big enough for the cardboard tube to fit through, leaving most of the tube sticking up like a funnel. To ensure that the funnel stays in place, cut some slits around the end of the tube that is inside the container, bend them back and sellotape them down. Use a hairdryer to blow warm air down the tube and watch the container lift of the ground like a hovercraft. You can move the hovercraft around like this too (but only as far as the hairdryer lead will let you!)
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