Hovercraft

REALLY easy took me only 5 mins from household stuff :) you'll need a
CD
water bottle that has the pull to open top
ballon
glue ( hot gun or elmers glue i use hot glue gun)
and you need only 5 minutes :)

remove the cap from the bottle

simply get the cap and the CD (use a CD thats not working) place the cap on the bottle like below (must be in the middle over the hole in the CD)

glue the cap on the CD

make sure there are no air leaks where you glued then blow up a ballon and put it on the cap (make sure the cap is shut so no air can escape)

when you are done pull the cap up and give it a good push (push it on a flat surface the flatter the better) heres a video