Its the new craze, why buy a go kart when you can build one. Lately people have been “borrowing” shopping carts and using the body as, well a go kart body. They use everything that a go kart uses such as a steering wheel, engine, and wheels. except it’s all on a go kart. Some videos show tall people not being able to get into it but saying it was super fun. So as long as your not really tall and have some basic knowledge of go kart parts its a breeze to make this fun toy.
It relates to engineering because you use different parts and tools to make it. You also need to go through a process so the go kart ends up right.