What's the absolute cheapest way I can make a lift for a marble roller coaster project? I'm estimating my roller coaster at 4 ft high. I was thinking of using a Archimedes screw, but how would I go about doing this?
What's a household product that would have a motor/gear that I can use to save some money? (I don't have any toy cars)
I will be using polytubing and wood base/support for my roller coaster if that matters.