"A Mind Jar is a meditation tool to use whenever a child feels stressed, overwhelmed or upset. Imagine the glitter as your thoughts. When you shake the jar, imagine your head full of whirling thoughts, then watch them slowly settle while you calm down".
This teacher did this for a preschool lesson, but it can be adapted for older kids. They could drop or open the balloons and observe what happens to the solid liquid and gas inside it. This would help identify the properties of solids, liquids and gases.