The 21st of October 2015 is an important date
in the history of time travel, because that is when Marty McFly goes back to the future
in Doc Brown’s flying Delorian. Now, we may not have flying cars or self-drying
jackets yet, but hoverboards… they are very real. Companies like Hendo and Lexus have
made some impressive prototypes which utilise magnets and quantum levitation.
And if you haven’t seen quantum levitation before, then check out this mind-blowing video
from our friends at the Royal Institution. But what if you want to make your own hoverboard
at home? Well, to make a miniature one all you’ll need is an old CD, a sports bottle
top, plasticine and a balloon. Stick a ring of plasticine around the hole
in the centre of the CD and push the bottle cap on top, making a tight seal.
Inflate the balloon and place it over the closed bottle top. We’ve added a customised
hoverboard design to our CD, check the video description to download a free template. Now
you’re ready to hover! Place the CD on a flat surface, pull the bottle
cap open and give it a little push. As the balloon deflates, it creates a cushion
of air below the CD. The CD floats on top this air, hovering above the surface.
Because our mini-hoverboard is gliding on a layer of air, there’s no friction between
it and the floor, meaning it can travel much further. I wonder… could we make this big enough
to ride? Do you think we could take our hovercraft out
on the road? Roads? Where we’re going we don’t need
roads! If you enjoyed this video, hit the like button,
share it around and click on my mini hoverboard to subscribe. Check the video description
for a link to download the hoverboard template. And if we’ve inspired you to try some science
at home, send us your pictures and videos on Facebook or Twitter. Thanks for watching! It creats a cushion of air below the CD… Aww what!? [Laughing]