Here's what you'll need to make one: 1) A 9” balloon 2) A pop-top cap from a liquid soap bottle or a water bottle 3) Hot stationary glue
Take a CD/DISC, cover the centre hole with a piece of tape and poke six holes in the tape with a push-pin. Then, glue the cap of a water bottle to the centre of the CD or DVD disc. Create a good seal to keep the air from escaping. Blow up the balloon all the way and pinch the neck of it. Make sure the pop-top is closed and fits the neck of the balloon over the pop-up portion of the cap. When you’re ready for it to start hovering, simply put the craft on a smooth surface and pop the top open.
The air flow created by the balloon causes a cushion of moving air between the disc and the surface. This lifts the CD and reduces the friction which allows the disc to hover freely. Large scale hovercrafts are capable of travelling over land, snow and water.