DIY stress balls are so easy to make! All you need is a balloon and a filler like flour or rice and you end up with a super fun, super squishy stress ball that's perfect for busy hands! How to Make a Stress Ball Homemade stress balls are SUPER SIMPLE to make at home. You can use flour, rice, water beads, play dough, and even oobleck as a filler inside the balloon. In order to get the flour inside the balloon, you'll also need a funnel. But no worries if you don't have one! Simply cut the…