Inside each ball is liquid latex which makes the magic happen when you squeeze it. Be careful you don't pierce the ball with your fingernails or any other sharp object lest you be left with a puddle of neon colored goo. Gotcha?
People deal with stress in different ways. Some of us prefer shouting curse words. Others go out for a smoke. Still others head to the kitchen for a snack. All of these are bad habits, of course. We have a solution for the stress eaters of the world. Go to Wikipedia and look up infectious diseases. We can promise you that seeing pictures of pustules and boils will kill any appetite you may think you have. And yes, this is your friendly copywriter monkey speaking from experience. *barf*
These stress balls come in a mesh-like bag. Do not remove the bag unless you want to ruin everything for everyone. Srsly, just leave it on because it's what makes the stress ball so much fun. Squeeze it hard and blisters will pop out of the holes in the bag and be a surprisingly different color than the ball itself, much like the things that come out of a boil when you lance it. Lost your lunch yet?