I plan on making a striking engine with my group for our physics project. A little model doesn't seem like it'd be too big of a trouble but I'm thinking a little kart and multiple pistons. Only problem is everything besides the engine. I have no idea where to find such a frame or wheels even, but I was thinking maybe a shopping cart hacked to work? Checkout this guys for an idea of what I wanna try.

He can follow, but not post, so direct everything towards him.