Things I used:
-Cardboard (fairly thick, I used cardboard from a shipping box)
-Wide Scotch tape
So basically try and cut out the pieces I used and glue them together. Then cover the tops with the scotch tape so you'll slide across it.
It's a pretty easy bbut cool looking thing to make for tech decks and works really well.
Anyway I hope you liked it and check my profile if you want to see what projects I am working on!