Children can help create sensory calming jars to help them with self-regulation and encourage mindfulness.  Use any clear container with a tight fitting lid and help children as needed to fill them with water, oil, glitter, confetti, food coloring, or beads.  Secure the lid tightly.  You can even use hot glue around the edge of the lid to be sure it is sealed.  Then allow children to use them to help them regain focus and be calm by shaking and gazing at the movement and patterns.