What could you do with this science trick? Inertia Stack Inertia is a really interesting property of matter and it can be manipulated in this fun and interesting way - using things you’ve got laying around the house! Basically, inertia is the tendency of stuff to stay still or keep moving unless you do something to change that. Sir Isaac Newton described it in his first Law of Motion: “Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to chang