brusspup t-shirts! http://brusspup.spreadshirt.com/
This is one of the most amazing demonstrations of physics ever. There are no batteries, no magnets, no moving parts of any kind. It's just the metal disk and the mirrored platform. Give it a spin and it will spin over 2 minutes with a good spin.
Download the song in this video:
Like me on Facebook:
Follow me on Twitter: