A Crumbler built from the bottom up involves a good sturdy base and chassis! There's plenty of material to work with, from wood to metal, and Amaya will go over some of the basic structural building things to note before letting you get started on your own. The main goal to complete for the day: four wheels attached to some sort of main flat base. If you've got time to want to start adding a little more, go for it! Work in a size you're comfortable with and just go from there!