Rolling Trash Can Wheels X1
Rolling Cart Wheels (They MUST be able to mount by screws) X1
2X4 (Big enough to lie down on) X1
Plywood (or any kind of flat wood, should be a little smaller than 2X4) X1
Nail (Kinda a carpet tack.) X1
(I put a pic of everything in the second picture.)
Thats basicly all you need besides a hill.