It looks soft and calm at first. Just a cloud floating above water. But slowly, the storm begins to change. Color spreads through the cloud layer. Moisture builds inside. And the heavier the cloud becomes, the closer it gets to breaking open. Then suddenly... the storm bursts through. That’s the moment kids move closer. Because now they’re not just watching color drip through a jar. They’re watching a glowing storm build right in front of them. This storm in a jar experiment is one of our favorite weather science activities because kids can actually see how storms build, shift, and release moisture over time. The glowing rain slowly spreads through the cloud before finally breaking through into the water below in drifting trails of color. Under blacklight, the entire storm glows. If your kids love glowing science activities, our Glow Activities for Kids guide is packed with even more glowing experiments and sensory play ideas.