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make this continuously moving hovercraft using an old CD, some rubber adhesive, a bottle
cap, scissors and flexible 1m long pipe. first make a hole in the bottle cap and then take
a 1m long flexi tube. press it very tightly in the hole. ensure that there is no leakage.
then take an old CD and on the underside of the CD apply some rubber adhesive in the middle.
let the adhesive dry for a little while. then fix the cap on the center. wait for a little
while for the adhesive to settle and this is the top view and this is the bottom view.
you can see the pipe is slightly inside. now place the Cd on a smooth surface and as you
blow you will be surprised that Cd moves to the left and the right just like a hovercraft.
the CD floats on the smooth surface. it floats on a cushion of air exactly like a hovercraft.
you can also place it on a sunmica table top with a smooth surface and as you blow the
CD will float. this is a very good exercise for lungs.