Car turned into a spaceship. Not very stable, but at least it's purist and it was important for me to build it only from parts in the set. And how are you going to make a good vehicle if there are only two 2x4 and two 1x1 angular bricks? There were a lot of SNOT-techniques required to make it look reasonable. But then again, it doesn't matter because it's built for looking good, not for being played with.
Made as a bin lorry many decades ago, the Grasshopper is now mainly used for very poor people who want an cheap inner-atmosphere conveyance. Because it was built en masse back then, there are no problems with replacement parts. Everything is avialable for a good price. The bad thing is: you'll probably need them.