Atoms are the particles from which everything in the physical world is made. When an atom interacts with a physical force like heat or electricity, it becomes an ion. Ions have positive or negative charges and are always looking to become neutral again. This is why the filaments of a plasma ball always move towards your hand. Need to find your balance? Try Ion Thinking Putty. It's white in daylight and glows a beautiful turquoise hue to help you find your center in the dark. Each tin includes 1/5 lb of Ion Thinking Putty - a huge handful for tons of fun.